This strain of echinacea does very well in pots and produces abundant flower heads. Gorgeous in flower arrangements and they make quite a functional property border. Please note: As you will see in the photo section, we include the chaff (black, pointy, and very ouchy). While we do try to remove as much of it as possible, it is impossible. The seed is the pale little pod. You won’t get a plant from planting the black ones.
Divide if plants begin to appear crowded.
Common name: Purple coneflower
Botanical name: Echinacea purpurea
Type: Herbaceous perennial
Scarification/Stratification: Cold stratify for 20 days in moist soil in the fridge then sow warm.
Self fertile: No
Hardiness: Zones 3 to 10
Sow temp/season: Late fall through early spring – 65F to 70F
Sow depth/spacing: 1/8 inch deep / one seed per 12 inches or one seed per flat.
Germination time: 10 to 15 days
Final spacing: One plant per 18 inches
Final height/spread: 24 inches wide / 36 inches tall
pH range: 5 to 8
Soil type: Since it’s the root you want, nice and loamy
Nutrition: Low nutritional requirements but a little compost helps out.
Drainage: Well-drained soil, please.
Water requirement: Moderate waterings but a bit more when flowering
Root type: Fibrous and abundant, especially after 3 years
Companion plants: Monarda, sedum, chickweed, plantain
Pest and disease resistance/susceptibility: Generally resistant to pests and diseases, but the most common pests include sweet potato whiteflies, aphids, Japanese beetles, and Eriophyid mites. Watch for stem rot, powdery mildew, and aster yellows.
Sun: Thrives in full sun but will tolerate partial shade
Time to maturity: 300ish days but the root is typically harvested during the 3rd year.
Hilling: Mulch in the spring to protect the crown.
Propagation: Wait for the seed or divide the root system.
Hybridization: Extreme caution if you want true seed. Plant different varieties 1/4 mile away.