what vegetables should be planted together

June 28, 2026

Here’s a practical, gardener-friendly guide to what vegetables should be planted together , plus what to keep apart, in a Quick Scoop style.

🌱 Quick Scoop

Many vegetables grow better, taste better, and suffer fewer pests when paired with the right “friends.”

Some combos are classics (tomatoes + basil), others are “never together” (onions + beans).

Use this as a starting map, then adjust based on your climate, soil, and space.

Top Companion Combos (Plant These Together)

These pairs/mini-guilds are widely recommended by gardening guides and almanacs.

1. Tomatoes and Friends

Tomatoes + basil
- Basil may help with pests and is often said to improve tomato flavor.

Tomatoes + onions/garlic/leeks (alliums)
- Alliums can help deter some insect pests around tomatoes.

Tomatoes + carrots + lettuce
- Carrots use root space, lettuce likes the shade under tomatoes.

Simple bed idea: a row of tomatoes with basil at their feet, carrots in between, and lettuce tucked in the shadiest spots.

2. Carrot Family Friends

Carrots + onions/shallots/leeks
- Onions can confuse carrot flies; carrots can help break up soil.

Carrots + tomatoes
- Good space-sharing and compatible root profiles.

Carrots + lettuce + radishes
- Radishes come up fast (marker crop), lettuce covers soil, carrots fill in later.

3. Leafy Greens “Anytime, Anywhere” Mixes

Lettuce + carrots + beets + radishes
- Great for tight beds; roots below, leaves above.

Lettuce + peas + beans + corn
- Tall plants give shade; lettuce stays cool and less bitter.

Spinach + brassicas (broccoli, cabbage, kale)
- Spinach fills gaps around bigger plants and likes similar conditions.

4. Beans, Peas, and Corn (The “Three Sisters” Plus)

Corn + beans + squash (the classic “three sisters”)
- Corn = living trellis; beans = nitrogen fixers; squash = living mulch.

Corn + cucumbers + melons
- Vines can run between corn rows, and corn gives some dappled shade.

Beans + potatoes + brassicas
- Bush beans pair well with cabbage family and potatoes in many charts.

5. Brassicas (Cabbage, Broccoli, Kale, Brussels Sprouts)

Brassicas + onions + garlic + leeks
- Pungent alliums can help deter cabbage pests.

Brassicas + beets + celery + lettuce
- They fill different soil layers and canopy heights.

Brassicas + rosemary/dill
- Strong-scented herbs can confuse or repel moths and flies.

6. Cucumbers and Their Allies

Cucumbers + beans + peas + corn
- Vertical plants support or shelter cucumbers, and legumes add nitrogen.

Cucumbers + lettuce + radishes + dill
- Quick crops and herbs around the vines, good use of edge space.

7. Root Crops and Alliums

Beets + cabbage family + lettuce + bush beans
- Commonly listed as compatible; beets don’t need much above-ground space.

Onions + carrots + beets + cabbage + lettuce + tomatoes
- Onions fit well in many mixed beds and help with pests.

Radishes + cucumbers + carrots + lettuce + spinach
- Quick harvest, good pest distraction, and soil-opening roots.

8. Peppers and Their Companions

Peppers + basil + onions + spinach + tomatoes
- Heat-loving group; basil and alliums again for pest pressure.

Pairs and Groups to Avoid

Many guides disagree at the margins, but these “do-not-pair” rules appear in multiple charts.

Classic No-Gos

Onions (and garlic) × beans and peas
- Alliums can stunt legumes; most charts warn against this.

Corn × tomatoes
- They share some pests/diseases and compete strongly for nutrients.

Potatoes × tomatoes
- Both in the nightshade family and share serious diseases (like blight).

Cabbage family × tomatoes
- Often listed as poor companions, possibly due to nutrient and root competition.

Other Common Warnings

Cucumbers × strong aromatic herbs (sage, rosemary)
- Often marked as “keep apart,” possibly due to growth or pest dynamics.

Spinach × potatoes, corn, peppers
- Some charts list these as “avoid”; spinach may perform worse nearby.

Brassicas × nightshades (peppers, eggplant, tomatoes)
- Sometimes separated to simplify pest/disease management.

Handy HTML Table for Your Garden Plan

Below is an HTML table you can copy into a note or garden planner.

html

<table>
  <thead>
    <tr>
      <th>Vegetable</th>
      <th>Good companions</th>
      <th>Avoid planting near</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Tomato</td>
      <td>Basil, carrots, lettuce, onions/garlic/leeks, asparagus, spinach</td>
      <td>Cabbage family, beets, peas, fennel, dill, corn, potatoes</td>
    </tr>
    <tr>
      <td>Carrot</td>
      <td>Onions, leeks, tomatoes, lettuce, radishes, rosemary, sage, chives</td>
      <td>Coriander, dill, parsnips</td>
    </tr>
    <tr>
      <td>Lettuce</td>
      <td>Beets, carrots, beans, peas, corn, radishes, onions, marigolds, garlic</td>
      <td>Parsley, some brassicas</td>
    </tr>
    <tr>
      <td>Onion (and garlic)</td>
      <td>Carrots, beets, cabbage, lettuce, parsnips, tomatoes, marjoram, rosemary</td>
      <td>Beans, peas, asparagus, sage</td>
    </tr>
    <tr>
      <td>Beans (green/bush)</td>
      <td>Corn, cucumbers, peas, potatoes, radishes, marigolds, nasturtiums, cabbage family</td>
      <td>Onions, garlic, leeks, beets (in some charts)</td>
    </tr>
    <tr>
      <td>Peas</td>
      <td>Beans, carrots, corn, cucumbers, radish, turnip, mint, chives</td>
      <td>Onions, garlic</td>
    </tr>
    <tr>
      <td>Corn</td>
      <td>Beans, peas, pumpkins, melons, squash, cucumbers, zucchini, lettuce, sunflowers</td>
      <td>Tomatoes</td>
    </tr>
    <tr>
      <td>Cucumber</td>
      <td>Beans, celery, corn, lettuce, peas, radishes, dill, marigolds, nasturtiums</td>
      <td>Sage, rosemary, broccoli, cabbage, cauliflower</td>
    </tr>
    <tr>
      <td>Cabbage &amp; other brassicas</td>
      <td>Celery, beans, beets, dill, onions, lettuce, potatoes, rosemary</td>
      <td>Tomatoes, eggplant, peppers, squash, strawberries</td>
    </tr>
    <tr>
      <td>Potato</td>
      <td>Beans, cabbage, peas, corn, marigolds, horseradish</td>
      <td>Tomatoes, cucumbers, melons, squash, sunflowers, turnips</td>
    </tr>
    <tr>
      <td>Radish</td>
      <td>Cucumbers, carrots, onions, beets, cabbage, kale, lettuce, spinach, squash</td>
      <td>Hyssop, broccoli, cabbage, cauliflower, turnip, mustard</td>
    </tr>
    <tr>
      <td>Spinach</td>
      <td>Lettuce, mustard greens, chard, kale, other leafy greens, strawberries</td>
      <td>Potatoes, corn, peppers</td>
    </tr>
    <tr>
      <td>Pepper</td>
      <td>Basil, onions, spinach, tomatoes</td>
      <td>Beans, brassicas, carrots, corn, cucumbers, radish, turnip, mint, chives</td>
    </tr>
    <tr>
      <td>Squash / Zucchini</td>
      <td>Beans, peas, radishes, peppermint, dill, parsley, oregano, marigolds, corn, sunflowers</td>
      <td>Potatoes, cucumbers, pumpkins (for some types), small delicate plants</td>
    </tr>
    <tr>
      <td>Beet</td>
      <td>Brassicas, lettuce, kohlrabi, bush beans</td>
      <td>Spinach, chard (same family)</td>
    </tr>
    <tr>
      <td>Asparagus</td>
      <td>Tomatoes, basil, parsley</td>
      <td>Onions, garlic, potatoes</td>
    </tr>
  </tbody>
</table>

Mini “Forum-Style” Perspective

“Companion planting charts are guides, not rigid laws. I mix what’s listed as ‘good neighbors’ but always watch how my own soil and climate respond, then adjust next season.”

Many experienced gardeners also point out that high diversity (lots of different crops, herbs, and flowers mixed) is often more important than following every small rule perfectly.

Quick Tips for Using This in 2026

Think in layers : tall (corn, tomatoes), mid (peppers, cabbage), low (lettuce, herbs), root (carrots, onions).

Add flowers (marigolds, nasturtiums) around beds for extra pollinators and pest confusion.

Keep nightshades (tomatoes, peppers, eggplant, potatoes) rotated yearly to reduce disease carryover, even if companions worked well.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.