Germination information for selected plants: approximate time to seed before last frost, days for germination, optium temperature for gemermination, and light requirements
Plant
Approximate Time to Seed Before Last Frost Date (Weeks)
Time Seeds Take to Germinate (Days)
Temperature °F
Light/Dark Requirement
Ageratum 8 5 to 10 70 Light
Alyssum 8 5 to 10 70 Either
Aster 6 5 to 10 70 Either
Balsam 6 5 to 10 70 Either
Begonia 12 or more 10 to 15 70 Light
Broccoli 8 5 to 10 70 Either
Browallia 12 or more 15 to 20 70 Light
Cabbage 8 5 to 10 70 Either
Cauliflower 8 5 to 10 70 Either
Celosia 8 5 to 10 70 Either
Centurea 6 5 to 10 65 Dark
Coleus 8 5 to 10 65 Light
Cosmos 4 or less 5 to10 70 Either
Cucumber 4 or less 5 to 10 85 Either
Dahlia 8 5 to 10 70 Either
Dianthus 10 5 to 10 70 Either
Eggplant 8 5 to 10 70 Either
Geranium 12 or more 10 to 20 70 Light
Impatiens 10 15 to 20 70 Light
Larkspur 12 or more 5 to 10 55 Dark
Lettuce 8 5 to 10 70 Light
Marigold 6 5 to 10 70 Either
Muskmelon 4 or less 5 to 10 85 Either
Nicotiana 8 10 to 15 70 Light
Pansy (Viola) 12 or more 5 to 10 65 Dark
Pepper 8 5 to 10 80 Either
Petunia 10 5 to 10 70 Light
Phlox 8 5 to 10 65 Dark
Portulaca 10 5 to 10 70 Dark
Snapdragon 10 5 to 10 65 Light
Squash 4 or less 5 to 10 85 Either
Stock 10 10 to 5 70 Either
Tomato 6 5 to 10 80 Either
Verbena 10 15 to 20 65 Dark
Vinca 12 or more 10 to 15 70 Either
Watermelon 4 or less 5 to 10 85 Either
Zinnia 6 5 to 10 70 Either

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© Erv Evans, Consumer Horticulturalist
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