What to Plant With Potatoes in a Raised Bed: 9 Good Companions

The best plants to grow with potatoes in a raised bed are lettuce, radishes, spinach, scallions, and other compact crops that can be harvested before potato plants become large. Bush beans, herbs, and low-growing flowers can also grow nearby when there is sufficient space. However, potatoes should remain the primary crop because they need room for roots, developing tubers, and soil hilling.

Companion planting can make a raised bed more productive, but not every combination offers a proven benefit. Some traditional recommendations claim that particular flowers repel potato beetles or that neighboring vegetables automatically increase potato yields. These claims are not always supported by research.

According to the University of Minnesota Extension, companion planting is most reliable when used to improve space efficiency, diversify planting, and provide habitat for beneficial insects.

Potatoes present a special challenge because gardeners must periodically mound soil around their stems to protect developing tubers from sunlight.

In this article, I cover nine practical companion plants for potatoes, explain which vegetables to keep separate, and show how to arrange companions in 4×4 and 4×8 raised beds. You’ll also learn when to plant and harvest companions, how to protect potato roots while hilling, and which common companion-planting claims deserve caution.

What to Plant With Potatoes in a Raised Bed: 9 Practical Options

The most useful potato companions are generally small, quick-growing, or located near the edges of the raised bed.

That approach allows potatoes to develop without excessive competition.

Best Potato Companion Plants at a Glance

Companion plant	Main advantage	Best location	Important consideration
Lettuce	Quick leaf harvest	Outer edge	Harvest before potato foliage becomes crowded
Radishes	Fast-growing root crop	Edge or temporary open space	Remove before major hilling
Spinach	Productive cool-season greens	Outer edge	May bolt as temperatures rise
Scallions	Narrow, upright foliage	Border	Keep outside the main hilling area
Bush beans	Additional vegetable harvest	Separate section or adjacent bed	Compete for space and water
Basil	Useful culinary herb	Sunny outer edge	Needs warm conditions
Cilantro	Cool-season herb; flowers support some insects	Border or nearby container	Bolts in hot weather
Sweet alyssum	Flowers can support beneficial insects	Edge or nearby container	Needs room to spread
Dwarf marigolds	Compact ornamental flowers	Corners or outside the bed	Not proven to repel potato beetles

These plants are suitable combinations under certain growing conditions, not guaranteed yield-boosting companions.

The right choice depends on how much space remains after providing for the potatoes.

1. Lettuce

Lettuce is one of the most practical plants to grow alongside potatoes.

It grows quickly during cool weather, which overlaps with the early development of spring-planted potatoes.

Loose-leaf lettuce can be harvested young before potato foliage spreads across the bed.

This makes lettuce useful for temporary planting along the edges.

Why lettuce works well:

• It has a relatively compact growth habit.
• Baby leaves can be harvested early.
• It uses otherwise open space during potato establishment.
• It can tolerate some partial shade.

However, mature potato plants can become approximately 2–3 feet tall and create substantial shade.

Lettuce should not remain crowded beneath dense potato foliage indefinitely.

Planting Tip: Grow a narrow row of loose-leaf lettuce near the bed’s outside edge. Harvest it before potato hilling or foliage expansion interferes with the plants.

2. Radishes

Radishes are another strong option because many varieties mature quickly.

Small spring radishes commonly become ready within approximately 25–40 days under suitable conditions.

That short growing period makes them useful while potatoes are still developing.

Radishes are particularly practical in raised beds with loose, well-drained soil.

Why radishes can work:

• They mature relatively quickly.
• They require limited space.
• They suit cool spring weather.
• They can be removed before the potato canopy fills the bed.

However, radishes grow underground, so harvesting them near established potato tubers requires care.

Avoid placing them immediately beside potato seed pieces.

Planting Tip: Sow radishes in a temporary row toward the perimeter. Pull them gently before the first major hilling operation.

3. Spinach

Spinach grows well during cool spring weather and can provide a harvest before potatoes reach full size.

Baby spinach leaves are particularly useful for short-term interplanting.

Like lettuce, spinach can use the open space around young potato plants.

However, spinach generally performs poorly during prolonged hot weather.

It may bolt as temperatures and day length increase.

Why spinach is useful:

• It fits into small planting areas.
• It provides an early leafy harvest.
• It has a relatively short growing period when harvested as baby greens.
• It can be removed before potatoes require more space.

Keep spinach away from the main potato stems so hilling doesn’t bury it.

Planting Tip: Grow baby spinach along the front edge of the bed and harvest the entire crop when potatoes begin spreading.

4. Scallions and Bunching Onions

Scallions have narrow, upright leaves that occupy relatively little horizontal space.

They may fit along the edge of a raised bed containing potatoes.

Unlike large cabbage plants or sprawling vines, scallions generally create less shading.

However, the practical benefit is mainly efficient use of planting space.

Claims that onions reliably repel potato pests simply by growing nearby are not well established.

Why scallions can work:

• Their foliage is relatively narrow.
• They can be harvested young.
• They offer an additional edible crop.
• They fit along borders when sufficient space remains.

Scallions still need moisture, nutrients, and root space.

Planting Tip: Use the outside border rather than planting scallions between potato stems. Harvest them before digging potatoes to avoid unnecessary root disturbance.

5. Bush Beans

Bush beans are frequently listed as companions for potatoes.

The West Virginia University Extension’s garden-planning guide includes Irish potatoes among potential companions for bush beans.

However, bush beans require more room than lettuce or radishes.

They are not automatically suitable for every small raised bed.

Why bush beans may be useful:

• They provide an additional vegetable harvest.
• They usually don’t need tall trellises.
• They belong to a different plant family from potatoes.
• They can be grown in a separate section when sufficient space is available.

Beans are legumes and can form nitrogen-fixing associations with soil bacteria.

However, growing beans beside potatoes does not automatically provide the potatoes with enough additional nitrogen to support their growth.

The nitrogen contribution depends on soil conditions, root nodulation, and whether plant residues remain.

Beans also compete for water and nutrients.

Planting Tip: Grow bush beans in a separate section of a large raised bed, an adjacent bed, or after an early potato harvest. Avoid squeezing them between closely spaced potato plants.

6. Basil

Basil can grow near potatoes when temperatures are warm enough.

Its compact foliage and repeated leaf harvests make it useful along a sunny border.

However, basil and potatoes have somewhat different seasonal preferences.

Potatoes generally perform well during cooler growing conditions, while basil is sensitive to frost.

That means the two crops may not have a long overlapping growing period in cooler climates.

Why basil can be considered:

• It provides an edible herb harvest.
• Compact varieties require limited space.
• It can grow along a sunny edge.
• Its flowers may support some visiting insects if allowed to bloom.

There is not strong evidence that simply planting basil beside potatoes reliably prevents Colorado potato beetles or increases tuber yields.

Planting Tip: Add basil near the edge after frost danger has passed, only if the potato canopy leaves enough sunlight and space.

7. Cilantro

Cilantro is a cool-season culinary herb that can grow near potatoes during spring.

It is useful because its leaves can be harvested while potato plants are still relatively small.

If allowed to flower, cilantro can also provide floral resources for certain beneficial insects.

However, that benefit depends on the insects present and the surrounding garden environment.

Why cilantro can work:

• It grows during cooler weather.
• It provides an early herb harvest.
• It can fit near a raised-bed border.
• Its flowers may contribute to beneficial-insect habitat.

Cilantro tends to bolt quickly during hot weather.

This can be useful if you want coriander seeds, but it shortens the period of tender leaf production.

Planting Tip: Sow cilantro near the outer edge, away from the area where soil will be mounded around potato stems.

8. Sweet Alyssum

Sweet alyssum is a low-growing flowering plant that can be used around vegetable beds.

Its small flowers provide resources for certain beneficial insects.

The University of Minnesota Extension explains that flowering plants can support adult hoverflies and other insects whose larvae or immature stages may feed on garden pests.

This is a general ecological benefit, not proof that sweet alyssum will prevent a specific potato pest problem.

Why sweet alyssum can be useful:

• It has a relatively low growth habit.
• It adds flowers around the bed.
• It can support beneficial-insect diversity.
• It can be grown in a nearby container.

However, alyssum spreads and requires sufficient space.

It should not cover the potato hilling area or interfere with watering and harvesting.

Planting Tip: Plant it along the outside edge or in a separate nearby container rather than between potato rows.

9. Dwarf Marigolds

Marigolds are commonly recommended in companion-planting charts.

Compact varieties can add color to a potato garden without occupying as much space as larger flowers.

However, their pest-control reputation needs clarification.

Marigolds are not a reliable solution for preventing Colorado potato beetles.

The University of Minnesota Extension’s research-based companion-planting guide reports that multiple studies found marigolds did not deter Colorado potato beetles.

That does not mean marigolds are useless.

They can still provide:

• Attractive flowers
• Habitat for visiting insects
• Additional garden diversity
• A decorative border

Some marigold species and varieties have demonstrated activity against certain root-knot nematodes under specific growing conditions, but simply planting a few beside potatoes is not a guaranteed nematode treatment.

Planting Tip: Choose compact marigolds and position them near the raised-bed corners or in containers. Grow them for flowers and diversity rather than expecting reliable potato beetle control.

Which Companion Plants Are Best for Different Goals?

Not every gardener wants the same benefit from companion planting.

Some want more vegetables from a small bed.

Others want flowers or a more diverse garden.

Gardening goal	Practical companion choices
Harvest vegetables quickly	Radishes, baby lettuce
Grow more leafy greens	Spinach, leaf lettuce
Use narrow border space	Scallions, cilantro
Add an herb harvest	Basil, cilantro
Grow another main vegetable	Bush beans in a separate section
Add attractive flowers	Dwarf marigolds, sweet alyssum
Support beneficial-insect habitat	Flowering cilantro, sweet alyssum
Keep potato hilling simple	Early radishes or lettuce that are harvested first
Minimize competition	Use containers outside the potato bed

For most beginners, lettuce, radishes, and spinach are the easiest starting companions because they can be removed before potato plants require more room.

What Not to Plant With Potatoes in a Raised Bed

Some crops should be kept separate because they share diseases with potatoes or compete heavily for space.

This doesn’t mean every neighboring plant chemically harms potatoes.

Most practical incompatibilities involve disease management, competition, and harvesting difficulties.

1. Tomatoes

Tomatoes and potatoes belong to the nightshade family, Solanaceae.

Both can be affected by late blight and certain other diseases.

Growing them closely together can complicate disease management.

They also need substantial space, sunlight, and nutrients.

For these reasons, tomatoes are generally better grown in a separate bed.

2. Peppers

Peppers also belong to the nightshade family.

They may share susceptibility to certain pathogens and pests with potatoes.

Planting them together does not provide a useful plant-family rotation.

Although peppers and potatoes can coexist in a garden, they are not an ideal combination for a crowded raised bed.

Use separate growing areas when practical.

3. Eggplants

Eggplants are another nightshade crop.

They share some pests with potatoes, including Colorado potato beetles.

Placing eggplants close to potatoes may complicate pest management.

It is generally easier to give these crops separate growing spaces.

4. Pumpkins and Large Squash

Pumpkins and vigorous squash varieties can spread across several feet of garden space.

Their large leaves may shade potatoes.

Their roots and vines can also interfere with soil hilling and eventual tuber harvesting.

Even if the crops aren’t inherently incompatible, they are usually poor space-sharing choices for a small raised bed.

5. Cucumbers

Many cucumbers develop long vines.

Without appropriate supports, they can spread across the potato planting area.

A trellised cucumber may occupy less ground space, but its roots still require adequate room.

For most compact raised beds, keeping cucumbers and potatoes in separate planting areas simplifies care.

6. Sunflowers

Sunflowers can become tall and cast considerable shade.

They also develop substantial root systems.

In a small raised bed, they can compete with potatoes for moisture, nutrients, and light.

If you want sunflowers in the garden, plant them far enough away that they don’t shade the potatoes.

7. Large Cabbage or Broccoli Plants

Cabbage and broccoli are sometimes listed as compatible potato companions in traditional charts.

They are not members of the nightshade family, which helps distinguish them from tomatoes and peppers.

However, mature brassicas can occupy considerable space and have substantial nutrient requirements.

In a small raised bed, full-size cabbage and broccoli may compete too heavily with potatoes.

They are generally better placed in a separate bed or planted after an appropriate crop finishes.

What About Carrots and Beets?

Carrots and beets are not automatically harmful to potatoes.

However, harvesting mature root crops near developing potato tubers can disturb the soil.

That disturbance may damage roots or tubers.

Quick-growing radishes harvested early are usually more practical in a shared potato bed.

Key Takeaway: Prioritize separating potatoes from other nightshades for disease management and from large, sprawling crops for space management. Most companion-planting restrictions are not absolute rules.

How to Arrange Potato Companions in a 4×4 Raised Bed

A 4×4-foot raised bed provides 16 square feet of growing area.

Potatoes can occupy much of that space once their foliage develops.

Therefore, the simplest arrangement is to grow potatoes as the main crop and use only a small amount of temporary border planting.

Example 4×4 Potato Bed Layout

For a compact planting:

• Plant approximately four seed potato pieces in a 2×2 arrangement, adjusting spacing to the variety and soil conditions.
• Leave enough room around each plant for hilling.
• Sow a limited number of radishes or baby lettuce near an outer edge.
• Harvest those companions early.
• Allow the potatoes to occupy the growing area as they mature.

This is an illustrative layout, not a universal planting density.

The bed’s soil depth, potato variety, and available hilling space may require fewer potato plants.

Why the Companion Plants Should Be Temporary

Potato plants can spread considerably.

As they mature, their leaves shade the soil and their roots occupy more space.

Keeping lettuce or radishes in place too long may increase competition.

It may also make hilling difficult.

Harvesting the companions early allows the potato crop to use the remaining space.

Can You Plant Flowers in the Corners?

Yes, if there is sufficient space.

However, a 4×4 bed containing several potato plants may become too crowded for permanent flowers.

A nearby container with sweet alyssum or dwarf marigolds is often a simpler option.

What to Plant With Potatoes in a 4×8 Raised Bed

A 4×8-foot raised bed provides 32 square feet.

It offers more flexibility than a 4×4 bed, but potatoes still need ample growing room.

Option 1: Potatoes With Early Salad Greens

Use potatoes as the main crop.

Plant seed pieces according to an appropriate spacing plan, leaving a manageable strip near an outside edge.

Sow early lettuce, spinach, or radishes in that temporary strip.

Harvest the greens before potato plants spread across the area.

This is one of the simplest ways to combine potatoes with another crop.

Option 2: Potatoes With Border Herbs

Reserve the main growing area for potatoes.

Place a small amount of cilantro or scallions at the outer edge.

Use basil only after weather conditions become warm enough and sufficient sunlight remains.

Avoid placing herbs directly where hilling soil must be added.

Option 3: Potatoes With Nearby Flowers

Dedicate the bed primarily to potatoes.

Place sweet alyssum or dwarf marigolds in small containers next to it.

This allows the flowers to grow without interfering with tuber development or harvesting.

How Many Potatoes Can Fit?

Spacing recommendations vary by growing system.

The Royal Horticultural Society’s raised-bed crop planner lists approximately 12 inches between potato plants for intensive raised-bed planting.

The University of Maryland Extension’s potato guide recommends approximately 8–12 inches within conventional rows and wider spacing between rows.

If you plan to add companions, use a less crowded arrangement rather than treating the maximum number of potatoes as the target.

Allow space for hilling and harvesting, not just initial planting.

When Should You Plant Companions With Potatoes?

Timing can be more important than the identity of the companion plant.

A short-season vegetable harvested early is less likely to compete with potatoes than one that remains throughout the growing season.

Early Spring

In many U.S. climates, spring is the primary potato planting period.

Potatoes can be planted when the soil has warmed sufficiently and conditions are suitable.

The University of Maryland Extension recommends a minimum soil temperature of approximately 45°F for planting potatoes.

Early companions may include:

• Radishes
• Spinach
• Loose-leaf lettuce
• Cilantro
• Scallions

These crops grow well under cool-season conditions.

Late Spring

As potatoes develop taller stems, hilling becomes necessary.

At this stage, remove companion crops that occupy the soil needed for mounding.

Do not bury lettuce, spinach, or other vegetables when adding soil around potato stems.

Summer

Mature potato foliage often occupies much of the bed.

Adding new companions during this stage can create competition.

For spring potato crops nearing harvest, it may be better to wait until the potatoes are removed before planting another vegetable.

Basil, bush beans, and other warm-season crops may be useful after early potatoes are harvested, provided the remaining growing season is long enough.

Fall

After harvesting potatoes, the bed may be suitable for fall crops such as:

• Lettuce
• Spinach
• Radishes
• Kale
• Certain other cool-season greens

This is succession planting rather than simultaneous companion planting.

It can be an efficient way to use the space without competing with developing potato tubers.

How to Plant Companions Without Damaging Potatoes

Potato roots and developing tubers can be disturbed by aggressive planting, weeding, and harvesting.

A good companion-planting arrangement must account for underground growth.

Step 1: Prepare the Potato Growing Area

Choose a location with adequate sunlight.

Potatoes generally perform best with at least six hours of direct sun, with approximately eight to ten hours preferred in suitable climates.

Use loose, well-drained soil.

Test soil fertility and pH when possible.

Step 2: Plant Certified Seed Potatoes

Purchase certified disease-free seed potatoes.

Avoid relying on ordinary supermarket potatoes because they may carry diseases without showing symptoms.

Plant seed pieces according to the variety and local extension recommendations.

Typical planting depth is approximately 3–5 inches.

Step 3: Reserve Space for Hilling

Potatoes need periodic soil mounding as the stems grow.

This protects developing tubers from sunlight.

Before planting companions, identify where additional soil will be placed.

Keep that area clear.

Step 4: Plant Companions Near the Perimeter

Choose quick-growing crops such as radishes, spinach, or lettuce.

Place them where you can harvest them without digging around the potato plants.

Do not crowd the potato stems.

Step 5: Harvest Companions Early

Remove temporary companions before they interfere with hilling or become shaded by potato foliage.

Take care not to pull up nearby potato roots.

Use gentle hand harvesting rather than deep cultivation.

Step 6: Hill the Potatoes

As potato stems grow, add soil around their bases according to the growing method.

The University of Minnesota Extension recommends beginning hilling when stems are about a foot tall and adding soil once or twice more.

The goal is to keep developing tubers covered.

Step 7: Keep the Bed Adequately Watered

Potatoes need consistent moisture, particularly during tuber development.

Check the soil below the surface.

Avoid both prolonged dryness and waterlogging.

Companion plants also use water, so crowded planting can increase competition.

Step 8: Harvest Potatoes Carefully

When the potatoes are ready, gently loosen the soil.

Avoid driving sharp tools deeply into the tuber area.

If permanent herbs or flowers remain in the bed, harvest carefully around them.

This is another reason why containers or temporary companions are often preferable.

Does Companion Planting Prevent Potato Beetles?

No companion plant reliably eliminates Colorado potato beetles from a potato crop.

This is an important distinction because many companion-planting guides recommend flowers or aromatic herbs specifically for pest prevention.

Do Marigolds Repel Colorado Potato Beetles?

Research summarized by the University of Minnesota Extension indicates that planting marigolds does not reliably deter Colorado potato beetles.

Multiple studies found that the commonly repeated claim was not supported.

Therefore, do not rely on marigolds as the main beetle-management strategy.

Does Basil Protect Potatoes?

Basil is sometimes recommended because of its aroma.

However, evidence that basil reliably repels Colorado potato beetles from nearby potatoes is insufficient.

Grow basil for culinary value and garden diversity rather than assuming it will protect the potato crop.

What Actually Helps Manage Potato Beetles?

Practical management may include:

• Inspecting plants regularly.
• Checking leaf undersides for egg clusters.
• Removing beetles or larvae by hand in small gardens.
• Rotating potatoes away from previous nightshade crops.
• Following local extension pest-management guidance.
• Using appropriate approved controls when necessary.

The best approach depends on pest pressure and local growing conditions.

Can Flowers Still Be Useful?

Yes.

Flowers can provide habitat and food for certain beneficial insects.

However, support for beneficial insects does not guarantee that a particular potato pest will be controlled.

Use flowers as part of garden diversity rather than as a replacement for monitoring and direct pest management.

How to Keep Potato Plants Healthy in a Mixed Raised Bed

Companion plants should not interfere with the essential growing requirements of potatoes.

Maintain Proper Soil pH

Potatoes generally prefer moderately acidic, well-drained soil.

The University of Maryland Extension identifies approximately pH 6.0–6.5 as suitable for normal growing conditions.

Where common scab is a persistent problem, more acidic soil may help reduce disease pressure.

However, do not acidify the soil without considering soil test results and the requirements of other crops.

Avoid Excessive Competition

Potatoes need nutrients, moisture, and sunlight to produce healthy tubers.

Large neighboring plants may reduce access to these resources.

Don’t crowd the bed simply to grow more vegetable varieties.

Fertilize According to Soil Needs

Potatoes have relatively high nutrient requirements.

However, fertilizer needs depend on existing soil fertility.

A soil test is the best basis for fertilizer decisions.

Excess nitrogen may encourage foliage growth without providing the desired tuber production.

Beans or other legumes should not be treated as a guaranteed substitute for appropriate fertility management.

Keep Tubers Covered

Potato tubers exposed to sunlight can develop green areas.

Greening is associated with increased glycoalkaloids, including compounds that can be toxic.

Keep developing tubers protected with adequate soil or suitable mulch.

Do not eat heavily green or bitter potatoes.

Manage Moisture Carefully

Potatoes need consistent moisture during active growth and tuber development.

Raised beds may dry more quickly than ordinary in-ground gardens.

Water according to soil moisture, rainfall, temperature, and plant growth.

Avoid keeping the soil saturated.

Rotate Potatoes Between Growing Areas

Potatoes, tomatoes, peppers, and eggplants belong to the same plant family.

Repeatedly growing these crops in the same bed can increase certain pest and disease risks.

The South Dakota State University Extension’s potato-growing guide recommends avoiding areas where potatoes or related crops have grown during the previous three years.

Where space permits, use a multi-year rotation with unrelated crop families.

Common Mistakes When Companion Planting With Potatoes

Several mistakes can reduce the usefulness of companion planting.

Mistake	Why it causes problems	Better approach
Planting tomatoes beside potatoes	Shared family and disease concerns	Use separate growing areas
Crowding the potato stems	Reduces space for hilling and airflow	Keep the main hilling area open
Leaving lettuce too long	Potato foliage may shade it	Harvest lettuce early
Growing large squash in the same small bed	Vines compete for space	Use a separate bed
Planting flowers directly in the hill	Hilling may bury or damage them	Use corners or containers
Harvesting root crops late	Can disturb potato tubers	Harvest early or plant elsewhere
Assuming beans supply all needed nitrogen	Nitrogen transfer is not guaranteed	Follow soil fertility guidance
Relying on marigolds for beetle control	Repellent claims lack support	Monitor and manage beetles directly
Planting too many companions	Creates competition for water and nutrients	Prioritize potatoes
Forgetting future harvest access	Makes digging difficult	Use removable or early companions

Why Simpler Planting Often Works Better

A potato bed needs room for several operations during the growing season.

These include hilling, watering, pest inspection, and harvesting.

A densely planted bed may look productive in early spring but become difficult to maintain later.

Using fewer companion plants often makes care easier.

When to Skip Companion Planting Entirely

It may be better to grow potatoes alone when:

• The raised bed is very small.
• Potato plants already occupy most of the area.
• You are growing large maincrop varieties.
• The bed has limited soil volume.
• You need room for substantial hilling.
• The garden has a history of serious potato disease.
• Access for harvesting is restricted.

Companion planting is optional.

A well-managed potato-only bed can be highly productive.

Is It Better to Plant Companions Beside Potatoes or After Harvest?

For many raised-bed gardeners, planting another crop after the potato harvest is easier than growing both crops simultaneously.

This method is called succession planting.

It allows you to use the same soil area for several crops without forcing them to compete at full size.

Example Spring-to-Fall Planting Sequence

Growing stage	Crop	Main purpose
Early spring	Potatoes	Main harvest
After early potato harvest	Bush beans	Warm-season crop if time permits
Fall	Lettuce or spinach	Cool-season harvest

This is an illustrative sequence.

Exact planting dates depend on the potato variety, local frost dates, and remaining growing season.

If potatoes are harvested late in summer or fall, there may not be time for bush beans.

In that situation, cool-season greens or a suitable cover crop may be more practical.

Why Succession Planting Can Be Easier

Succession planting offers several advantages:

• Less competition between mature crops
• Easier potato hilling
• Simpler tuber harvesting
• More predictable spacing
• Better access for soil preparation
• Additional seasonal harvests

Companion planting and succession planting are not mutually exclusive.

For example, you can grow early radishes near spring potatoes and then plant another crop after harvesting the potatoes.

Conclusion

Deciding what to plant with potatoes in a raised bed starts with choosing crops that won’t compete heavily for light, water, nutrients, or underground growing space.

Lettuce, radishes, and spinach are among the most practical options because they can be harvested before potato plants become large. Scallions, basil, and cilantro may also work around the edges when growing conditions are suitable.

Bush beans can be useful in a separate section or nearby bed, while sweet alyssum and dwarf marigolds can add flowers and garden diversity.

However, companion plants should never interfere with potato hilling.

I recommend giving potatoes most of the raised bed and using only a narrow border for quick-growing greens. For flowers, a few containers beside the bed are often more practical than planting directly among the potato stems.

Keep tomatoes, peppers, and eggplants separate when possible because they share important pest and disease concerns with potatoes.

Finally, remember that companion planting is not a guaranteed method of pest control or yield improvement.

Healthy seed potatoes, good soil drainage, adequate sunlight, proper spacing, consistent watering, and careful disease management remain the foundation of a successful potato harvest.

FAQs About What to Plant With Potatoes in a Raised Bed

What Is the Best Companion Plant for Potatoes?

Lettuce and radishes are among the most practical companions for potatoes in a raised bed.

They grow relatively quickly and can be harvested before potato plants need additional space for hilling and tuber development.

Can You Grow Potatoes and Onions Together in a Raised Bed?

Yes, scallions or bunching onions can grow along the edge when sufficient space is available.

However, keep them away from the area where soil will be mounded around potato stems.

Onions are not proven to repel all potato pests.

Can You Plant Beans With Potatoes?

Yes, bush beans can grow near potatoes under suitable conditions.

However, both crops need water, nutrients, and growing space.

For a small bed, an adjacent section or separate bed may be preferable.

Beans do not automatically provide enough nitrogen to fertilize the potatoes.

Can You Grow Lettuce With Potatoes?

Yes. Lettuce is a practical early companion.

Grow it near an outer edge and harvest young leaves before potato plants become large.

Avoid leaving lettuce in the area required for potato hilling.

Can You Plant Carrots With Potatoes?

Carrots and potatoes are not inherently incompatible, but harvesting mature carrots may disturb developing potato tubers.

They also compete for underground space.

For most small raised beds, quick-growing radishes are easier to manage as a temporary root crop.

Can You Grow Cabbage and Potatoes Together?

Cabbage and potatoes belong to different plant families, and some traditional companion charts list them as compatible.

However, mature cabbage plants require substantial space and nutrients.

They are generally better grown in a separate area rather than crowded into a small potato bed.

Do Marigolds Keep Potato Bugs Away?

No reliable evidence shows that planting marigolds consistently repels Colorado potato beetles.

University of Minnesota Extension reports that multiple studies failed to support this common claim.

Marigolds can still be grown for flowers and garden diversity.

Can You Plant Tomatoes and Potatoes in the Same Raised Bed?

It is generally better to keep them separate.

Tomatoes and potatoes belong to the nightshade family and share susceptibility to certain diseases, including late blight.

They also have substantial space and nutrient requirements.

What Can You Plant After Harvesting Potatoes?

Depending on the season, you may be able to plant bush beans, lettuce, spinach, radishes, kale, or a suitable cover crop.

Choose crops that can mature before the next frost and account for the bed’s disease history and soil fertility.

How Much Space Should You Leave Around Potatoes for Companion Plants?

Allow enough space for the potato variety’s mature canopy, roots, and hilling area.

Potato seed pieces are commonly spaced about 8–12 inches apart within rows, while row spacing varies by system.

In a small raised bed, use only a narrow temporary companion strip near the edge rather than planting vegetables directly between potato stems.