Cover the seeds and place the pot in a sunny location. Optimum germination temperatures are between 68 Page 2 to 86ºF, or 20 to 30ºC. Germination should be achieved in two days. Prairie coneflower seeds can be planted in the fall.
Description: Ratibida columnifera. Plant this perennial wildflower in your organic flower garden, or grow it in containers. ... Flowers appear from late spring to autumn, and stems can range from 60-150cm (24-60") tall.
upright prairie coneflower: Ratibida columnifera (Asterales: Asteraceae): Invasive Plant Atlas of the United States.
Start transplants in a cold frame in early spring, or direct sow in May to June. Starting indoors requires vernalization – wrap planted pots in plastic and store in the refrigerator for one week, and then provide 20°-24°C (68°-75°F). Do this step 4-6 weeks before planting out. Seeds will germinate in 7-42 days.. . . . .364011234082!]0000000000000009783314144958!]
