1. A change in the chemistry of a gene that is perpetuated in subsequent divisions of the cell in which it occurs; a change in the sequence of base pairs in the chromosomal molecule. 2. De Vries, term for the sudden production of a species, as distinguished from variation. [L. muto, pp.
Sugar or snow peas are grown for their flat, green pods. Peas are a cool-season crop that must mature before the weather gets warm. The ideal growing temperature for peas is 55Â°F to 70Â°F. Sow peas in the garden 6 weeks before the average last frost date in spring or as soon as the soil can be worked.How to plant and spacing.lanting time. Peas are a cool-season crop that must mature before the weather gets warm. The ideal growing temperature for peas is 55Â°F to 70Â°F. Sow peas in the garden 6 weeks before the average last frost date in spring or as soon as the soil can be worked.
Soil temperatures at which vegetable seed will grow include the minimum temperature required for seed growth, an optimum temperature and a realistic soil temperature. The realistic soil temperature is somewhere between optimum and minimum; it is the temperature at which you should plant to insure maximum success.For instance, the optimum soil temperature for seed germination of vegetable crops, such as cucumber, cantaloupe, okra, pumpkin, squash and watermelon, is 95Â°F.he realistic soil temperatures recommended for these crops are beans (72Â°F), beets (45Â°F), tomato (55Â°F), turnip (50Â°F) and corn (55Â°F). As might be expected, vegetables which are really cold-tolerant, such as carrots, parsley, lettuce and spinach, have lower optimum soil temperatures for seed germination.