| From Iowa State University, a guide to germination requirements of commonly grown annual flowers. |
|---|
| Annual | Germination Temperature (Fahrenheit) | Lighting | Days to Germination | Weeks Sowing to Planting |
|---|---|---|---|---|
| Ageratum (Ageratum houstonianum) | 70-75 | L | 7-10 | 8 |
| Snapdragon (Antirrhinum majus) | 70 | L | 7-14 | 8-10 |
| Wax Begonia (Begonia x semperflorens-cultorum) | 70-75 | L | 14 | 10-12 |
| Annual Aster (Callistephus chinensis) | 70 | L-D | 7-10 | 6-8 |
| Vinca (Cathranthus roseus) | 70-75 | L-D | 14 | 10 |
| Cockscomb (Cleosia spp.) | 70-75 | D | 7-10 | 6-7 |
| Bachelor's Button (Centaurea cyanus) | 65-70 | L-D | 7-14 | 8 |
| Cosmos (Cosmos spp.) | 70 | D | 5-7 | 4-6 |
| Lisianthus (Eustoma grandiflorum) | 75 | L | 10-14 | 14 |
| Globe Amaranth (Gomphrena globosa) | 70 | L-D | 14 | 7-8 |
| Sunflower* (Helianthus annuus) | 70 | D | 5-7 | 3-4 |
| Strawflower (Helichrysum bracteatum) | 70-75 | L-D | 7-10 | 6-8 |
| Impatiens (Impatiens wallerana) | 70-75 | L | 10-14 | 8-10 |
| Statice (Limonium sinuatum) | 70 | L-D | 7-10 | 8-10 |
| Melampodium (Melampodium paludosum) | 65-70 | L-D | 7-10 | 7 |
| Four-O'Clock (Mirabilis jalapa) | 70 | D | 5-7 | 6-8 |
| Flowering Tobacco (Nicotiana alata) | 70-75 | L | 10-14 | 8 |
| Geranium (Pelargonium x hortorum) | 70-75 | D | 7-21 | 12 |
| Petunia (Petunia x hybrida) | 75 | L | 7-10 | 8-10 |
| Moss Rose (Portulaca grandiflora) | 75 | L | 7-10 | 10 |
| Black-Eyed Susan (Rudbeckia spp.) | 70 | L-D | 7-14 | 10 |
| Red Salvia (Salvia splendens) | 70-75 | L | 10-14 | 8 |
| Mealycup Sage (Salvia farinacea) | 70-75 | L | 10-14 | 8-9 |
| Creeping Zinnia (Sanvitalia procumbens) | 70 | D | 7-10 | 6-7 |
| Coleus (Solenostemon spp.) | 70-75 | L | 10-14 | 8-10 |
| Dahlberg Daisy (Thymophylla tenuiloba) | 65-70 | L | 14 | 8 |
| Nasturtium* (Tropaeolum majus) | 65-70 | D | 10-14 | 5-6 |
| Zinnia (Zinnia elegans) | 70 | D | 5-7 | 5 |
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