Germination and Soil Temperature
Crop |
Minimum °F |
Optimum Range °F |
Optimum °F |
Maximum °F |
Bean |
60 |
60-85 |
85 |
95 |
Beet |
40 |
50-85 |
85 |
95 |
Cabbage |
40 |
45-95 |
85 |
100 |
Carrot |
40 |
45-85 |
80 |
95 |
Cauliflower |
40 |
45-85 |
80 |
100 |
Celery |
40 |
60-70 |
70* |
85* |
Swiss chard |
40 |
50-85 |
85 |
95 |
Corn |
50 |
60-95 |
95 |
105 |
Cucumber |
60 |
60-95 |
95 |
105 |
Eggplant |
60 |
75-90 |
85 |
95 |
Lettuce |
35 |
40-80 |
75 |
85 |
Muskmelon |
60 |
75-95 |
90 |
100 |
Onion |
35 |
50-95 |
75 |
95 |
Parsley |
40 |
50-85 |
75 |
90 |
Pea |
40 |
40-75 |
75 |
85 |
Pepper |
60 |
65-95 |
85 |
95 |
Pumpkin |
60 |
70-90 |
95 |
100 |
Radish |
40 |
45-90 |
85 |
95 |
Spinach |
35 |
45-75 |
70 |
85 |
Squash |
60 |
70-95 |
95 |
100 |
Tomato |
50 |
60-85 |
85 |
95 |
Watermelon |
60 |
70-95 |
95 |
105 |
* Daily fluctuation to 60° or lower at night is essential
