Spacing: Coneflowers are clumping plants. One plant will tend to get larger, but it will not spread and overtake the garden via roots or rhizomes. The eventual size of the plant clump depends on the cultivar, so check the mature size listed in the plant description to help you decide on spacing.

Are echinacea roots invasive?

The most important reason echinacea belongs in every garden is that it is a native plant. … They become invasive because there is nothing to stop them from spreading and crowding out our native plants. Good examples of foreign invasive plants are kudzu in the South and purple loosestrife in the Northeast.

Does Echinacea multiply?

Coneflowers will multiply under good conditions, namely disturbed soil and plentiful seed that falls from the spent flower. Two Coneflower Plants that grew from seed dropped by the nearby, larger plant.