Purple Coneflower

Coneflower prefers full sun and well-drained soil. It is drought tolerant and can tolerate a wide range of soil types, from sandy to clay. It prefers a slightly acidic soil with a pH of 6.0-7.0. It is important to keep the soil moist but not soggy.

Direct seed outdoors just before the last spring frost or in the fall after temperatures have moderated.  Sow in clusters of 3-4 seeds, planting seeds 1/4" deep with 18-24" between clusters.  Keep moist until germination has occurred.  Can also be started indoors 8-10 weeks before the last frost.

Harden off seedlings for a few days prior to transplanting. After danger of frost has passed, dig a hole roughly the size of the root ball and lower the seedling in, being careful not to disturb the roots. Backfill with loose soil and water well. Space plants 18-24" in all directions. Keep well-watered until the plants are established.

Although generally easy to grow, coneflower can be attacked by leaf hoppers. The Aster leaf hopper in particular has been known to attack coneflower and is responsible or spreading aster yellow, a disease that causes yellowing of leaves and irregular growth. Monitor plants regularly for leaf hoppers and treat immediately with insecticidal soap or neem oil if found. Remove any yellowed foliage and destroy to limit disease carryover.

Coneflowers make excellent cut flowers. The flowers are beautiful at nearly all stages of development and will keep for up to a week in a vase.

CONSIDERATIONS:

To harvest coneflower seeds, wait until the flower heads have dried and then cut them off the stem. Separate the seeds from the dried flower head and store them in a cool, dry place.

HARVESTING SEED:

SEED LONGETIVITY:

Coneflower seeds can remain viable for up to five years if stored in a cool, dry place.