Most Annual Flower Seeds Need No Cold Stratification What Is Cold Stratification of Seeds? Some seeds, especially those of the perennial native wildflowers, need to be placed in a cold place for a period before the time for germination. It is okay if those seeds are stored in a refrigerator, but I choose to sow…
Tag: What Is Cold Stratification of Seeds?
Flower Seeds that Require Cold Stratification
Milkweed (Asclepias) Lupine (Lupinus) St. John’s Wort (Hypericum perforatum) Prairie Coneflower (Ratibida) Prairie Violet (Viola pedatifida) Pincushion Flower (Scabiosa) Marsh Marigold (Caltha palustris) Perennial Sunflowers (Helianthus) Wild Geranium (Geranium maculatum) Rudbeckia (most varieties) Coneflower (some varieties) Soapwort (Saponaria ocymoides) Primrose (Oenothera speciosa) Larkspur (Delphinium) Shooting Star (Dodecatheon meadia) Heliopsis Lavender/Hyssop (Agastache foeniculum) Catmint (nepeta) Ironweed (Vernonia gigantea) Prairie Violet Image Credit: American Meadows Height 3″ – 6″ Soapwort Image Credit:…