Cricket Song Farm

Cricket Song Farm

Friday, January 30, 2015

Soil Temperatures for best results of Germination and Growth

Here are a few guidelines for determining the best time to plant your seeds.
Using a soil temperature gauge is a good indicator of when your soil has warmed sufficiently to allow your seeds to germinate.  I have noticed over the years that planting my seeds of cool season crops a week behind the volunteers ( greens, lettuce, chard, spinach, etc.)  that pop up in the spring usually results in a good germination and growth rate.

Soil Temperature Conditions for 
Vegetable Seed Germination
     35 degrees- spinach, lettuce, onion, parsnip

40 degrees- beet, cabbage, carrot, cauliflower, celery, chard,  garlic, parsley, pea ,radish, turnips

50 degrees-asparagus, corn

60 degrees-beans, cucumber, eggplant, musk melons, pepper, pumpkin, squash, watermelon

Do not plant seeds of warm weather crops until the soil is 60 degrees or warmer, usually 2 weeks after your last frost.

Satisfactory Temperatures to encourage plant growth

Arugula is one of the first volunteers to sprout in the early spring


 30 degreesAsparagus. Rhubarb

40-65 degrees- beet, broccoli, Brussels sprouts, cabbage, chard, collard, horseradish, kale, kohlrabi, parsnips, radish, rutabaga, sorrel, spinach, turnip

45-75 degrees-artichoke, carrot, cauliflower, celeriac, celery, chicory, Chinese cabbage, endive Florence fennel, lettuce, mustard, parsley, pea, potato

45-85 degrees-  chicory, chives, garlic, leeks, onion, salsify, shallots


     60-90 degrees-  beans, lima beans, corn, cucumber, musk melon, new Zealand spinach, pumpkin, squash,


65-100 degrees-eggplant, hot pepper, okra, sweet potato, tomato, watermelon

Hot weather crops need to be grown in the Green house at the Farm in Beryl.  Cold nights and late frosts until the end of JUNE inhibit their growth.   However, I had a beautiful outdoor crop of peppers and tomatoes in Roosevelt.

Start seeds indoors for these warm weather veges

I also recommend planting seeds of  winter squash, summer squash, and cucumbers instead of buying plants.
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picture proof that seeds planted at the right soil temperature will out preform transplants.

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