Onions icon

Onions

Vegetable Allium cepa

Bulb crop grown for pungent edible layers.

When to Plant Onions

Enter your ZIP Code to customize Onions planting dates for your area (based on local frost dates).

Tip: Enter your ZIP to see exact seed-start / transplant / direct-sow timing for your area.

Strong companions

Arugula icon Arugula
Severity: high
Common companion
Bok Choy icon Bok Choy
Severity: high
Common companion
Broccoli icon Broccoli
Severity: high
Common companion
Brussels Sprouts icon Brussels Sprouts
Severity: high
Common companion
Cabbage icon Cabbage
Severity: high
Common companion
Cauliflower icon Cauliflower
Severity: high
Common companion
Chinese Cabbage (Napa) icon Chinese Cabbage (Napa)
Severity: high
Common companion
Collard Greens icon Collard Greens
Severity: high
Common companion
Daikon Radish icon Daikon Radish
Severity: high
Common companion
Kale icon Kale
Severity: high
Common companion
Kohlrabi icon Kohlrabi
Severity: high
Common companion
Mustard Greens icon Mustard Greens
Severity: high
Common companion
Radishes icon Radishes
Severity: high
Common companion
Romanesco
Severity: high
Common companion
Tatsoi icon Tatsoi
Severity: high
Common companion
Turnip Greens icon Turnip Greens
Severity: high
Common companion
Banana Peppers icon Banana Peppers
Severity: medium
Compatible pairing
Banana Peppers icon Banana Peppers
Severity: medium
Compatible pairing
Beets icon Beets
Severity: medium
Carrot/onion pairing
Bell Peppers icon Bell Peppers
Severity: medium
Compatible pairing
Blackberries icon Blackberries
Severity: medium
Often compatible
Blueberries icon Blueberries
Severity: medium
Often compatible
Butterhead Lettuce icon Butterhead Lettuce
Severity: medium
Compatible growth
Carrots icon Carrots
Severity: medium
Carrot/onion pairing
Eggplant icon Eggplant
Severity: medium
Compatible pairing
Endive
Severity: medium
Compatible growth
Escarole icon Escarole
Severity: medium
Compatible growth
Ground Cherries icon Ground Cherries
Severity: medium
Compatible pairing
Hot Peppers (General) icon Hot Peppers (General)
Severity: medium
Compatible pairing
Iceberg Lettuce icon Iceberg Lettuce
Severity: medium
Compatible growth
Jalapeño Peppers icon Jalapeño Peppers
Severity: medium
Compatible pairing
Jerusalem Artichoke (Sunchoke) icon Jerusalem Artichoke (Sunchoke)
Severity: medium
Carrot/onion pairing
Lettuce icon Lettuce
Severity: medium
Compatible growth
Parsnips icon Parsnips
Severity: medium
Carrot/onion pairing
Poblano Peppers icon Poblano Peppers
Severity: medium
Compatible pairing
Potatoes icon Potatoes
Severity: medium
Carrot/onion pairing
Raspberries icon Raspberries
Severity: medium
Often compatible
Romaine Lettuce icon Romaine Lettuce
Severity: medium
Compatible growth
Rutabaga icon Rutabaga
Severity: medium
Carrot/onion pairing
Spinach icon Spinach
Severity: medium
Compatible growth
Strawberries icon Strawberries
Severity: medium
Often compatible
Sweet Potatoes icon Sweet Potatoes
Severity: medium
Carrot/onion pairing
Swiss Chard icon Swiss Chard
Severity: medium
Compatible growth
Tomatillos
Severity: medium
Compatible pairing
Tomatoes icon Tomatoes
Severity: medium
Compatible pairing
Turnips icon Turnips
Severity: medium
Carrot/onion pairing

Pest-control pairings

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Avoid planting with

Bush Beans
Severity: high
Inhibits legumes
Bush Beans
Severity: high
Inhibits legumes
Cowpeas (Southern Peas) icon Cowpeas (Southern Peas)
Severity: high
Inhibits legumes
Cowpeas (Southern Peas) icon Cowpeas (Southern Peas)
Severity: high
Inhibits legumes
Fava Beans icon Fava Beans
Severity: high
Inhibits legumes
Fava Beans icon Fava Beans
Severity: high
Inhibits legumes
Green Beans icon Green Beans
Severity: high
Inhibits legumes
Green Beans icon Green Beans
Severity: high
Inhibits legumes
Lima Beans icon Lima Beans
Severity: high
Inhibits legumes
Lima Beans icon Lima Beans
Severity: high
Inhibits legumes
Peas icon Peas
Severity: high
Inhibits legumes
Peas icon Peas
Severity: high
Inhibits legumes
Pole Beans
Severity: high
Inhibits legumes
Pole Beans
Severity: high
Inhibits legumes
Soybeans (Edamame) icon Soybeans (Edamame)
Severity: high
Inhibits legumes
Soybeans (Edamame) icon Soybeans (Edamame)
Severity: high
Inhibits legumes
Wax Beans
Severity: high
Inhibits legumes
Wax Beans
Severity: high
Inhibits legumes
Fennel icon Fennel
Severity: medium
Isolate fennel
Fennel icon Fennel
Severity: medium
Isolate fennel
Mint icon Mint
Severity: medium
Aggressive spreader
Mint icon Mint
Severity: medium
Aggressive spreader