Growing globe thistle from clump division is the fastest way to get flowers. Divide the basal growth away in spring from plants that are at least 3 years old. You may also take 2- to 3-inch (5-7.5 cm.) root cuttings in spring to start new plants.
Can you split thistle?
Echinops don’t need any special treatment other than cutting back after flowering. Sometimes, this can encourage a second flush of blooms. You may need to stake taller varieties, but only if your garden is a little more exposed and windy. If clumps become congested, lift and divide them in autumn or spring.
How do you propagate thistle?
- Snip a healthy 2- to 4-inch stem from the milk thistle before the fall frost. …
- Pull off any lower leaves up to the halfway point of the cutting.
