Sowing & Growing

Sow seeds in late winter to spring or in late summer to autumn. Echinacea will flower in 11 to 15 weeks so if started indoors early enough, it is possible to get flowers in the first season.

Sowing Indoors; Sow at 20 to 24°C (68 to 75°F), Fill pots or trays with a good seed starting mix (John Innes or similar). Moisten by standing the pots in water, then drain. Surface sow the seed and press lightly into the soil. Seeds need light to germinate, so do not cover the seeds or use only a light sprinkling of vermiculite. The compost should be kept moist but not wet at all times. Germination may start after only 5 days but may take up to 20 days. Prick out each seedling as it becomes large enough to handle, transplant into 7.5cm (3in) pots or trays to grow on.

Plant out in spring into well drained soil. Gradually acclimatise to outdoor conditions for 10 to 15 days before planting out. In their natural environment, the seeds would germinate after a period of cold, so if there is little or no germination move the tray to a cold area: at around 4°C for 2 to 4 weeks. Once you have picked out the remaining seedlings place the tray outdoors in a sheltered area for the winter. Come back to it in spring, more seedlings may await!

Echinacea are generally low maintenance. Grow in deep, well-drained, humus-rich soil ideally in full sun although they can tolerate some shade. Plant in light shade in hot climates. They are tolerant of drought, heat, humidity and poor soil. Avoid over-watering as Echinacea prefer drier conditions once established. No additional fertilising is necessary as heavy fertilisation leads to tall, leggy plants that flop.

These plants are easy to grow although, as with many perennials, they usually take more than one growing season to truly begin to flower. Cut back stems as the blooms fade to encourage further flower production. Once they are established Echinacea will freely self-seed if some deadheads are left intact. Goldfinch fight for the seeds. If you want to harvest them cover with a net after the seed begins to form. The seed can be difficult to harvest and are easiest after rain or early in the morning when they are wet from dew. The prickly seed heads are soft and pliable, they can be broken in half with your fingers and the seeds picked out. Dividing every few years will keep them healthy. Divided in spring or autumn, although this should not be too often and care should be taken as they resent a lot of disturbance.

When growing from seed directly, remember the process. It will grow large green leaves first, and it’s not uncommon to blossom much later than expected.