Germination Info & Soil Temp

See links below from Harvest to Table.com with plant-specific advice including soil temps.


Min/Opt/Max temps from IFAS

MINIMUM Soil Temperature for Germination

  • 32° – Endive, Lettuce, Onion, Parsnip, and Spinach
  • 40° – Beet, Broccoli, Cabbage, Carrot, Cauliflower, Parsley, Pea, Radish, Swiss Chard, and Celery
  • 50° – Asparagus, Sweet Corn, Tomato, and Turnip
  • 60° – Lima bean, Snap Bean, Cucumber, Okra, and Pepper
  • 65° – Eggplant, Muskmelon, Pumpkin, Squash, and Watermelon

OPTIMUM Soil Temperature for Germination

  • 70° – Celery, Parsnip, and Spinach
  • 75° – Asparagus, Endive, Lettuce, and Pea
  • 80° – Lima Bean, Carrot, Cauliflower, Onion, Radish, Tomato, Turnip
  • 85° – Snap Bean, Beet, Broccoli, Cabbage, Eggplant, Parsley, Pepper, Sweet Corn, and Swiss Chard
  • 95° – Cucumber, Muskmelon, Okra, Pumpkin, Squash, and Watermelon.

MAXIMUM Soil Temperature for Germination

  • 75° – Celery, Endive, Lettuce, and Spinach
  • 85° – Lima Beans, Parsnip, and Pea
  • 95° – Asparagus, Snap Bean, Beet, Broccoli, Cabbage, Carrot, Cauliflower, Eggplant, Onion, Parsley, Pepper, Radish, Swiss Chard, and Tomato
  • 106° – Cucumber, Muskmelon, Okra, Pumpkin, Squash, Sweet Corn, Turnip, and Watermelon

From Harvest to Table.com

CropGermination
Minimum Soil
Temperature (°F)
Germination
Optimum Soil
Temperature
Range (°F)
Germination
Maximum Soil
Temperature (°F)
Days to
Germination
at Optimal
Temps
Asparagus5060-859514-18
Bean, lima6075-85854-10
Bean, snap6075-85954-10
Beet4060-85954-10
Broccoli4060-85957-10
Brussels sprouts4060-85953-10
Cabbage4060-85955-10
Carrot4065-85956
Cauliflower4065-85954-10
Celery4060-709510
Chinese cabbage4060-85954-10
Collards4060-85955-10
Corn5065-951054-10
Cucumber6065-951055-7
Eggplant6075-859510-15
Endive/Escarole3560-758510-14
Garlic3565-85957-14
Kale4060-85955-7
Kohlrabi4060-951055-10
Leeks3565-85958-16
Lettuce3560-75852-10
Muskmelon6075-951054-10
Mustard3560-75854-6
Okra6085-951057-12
Onion3565-85954-12
Parsley4065-85955-6 weeks
Parsnip3565-75855-28
Pea4065-75855-7
Pepper6065-75957-10
Pumpkin6085-951054-10
Radicchio3560-75855-7
Radish4065-85954-10
Spinach3565-75756-14
Squash6085-951057-10
Swiss chard4065-85957
Tomato5065-85955-7
Turnip4060-951053-10
Watermelon6070-951054-10
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