Easy plant, grows naturally into an untidy clump. Cut back after flowering to promote more stems and avoid self seeding. Providing support early in the growing season, holds the flowers from the floor
Easily self seeds be can also be divided from existing clumps
Can be started in pots in the spring, using peat free compost and covering lightly with vermiculite. Use a cold frame germination needs 18c
Enjoys full sun, in well drained soil with some moisture.
Mildew can be a problem
Cirsium easily produces thistle type seeds, with a downy appearance. Pull off the plant on a dry day and plant in the spring. Remove immature seed heads to prevent self seeding.
These estimates for how long Cirsium rivulare takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.
Average 14 days | Min days | Max days (0)
Average days | Min days | Max days (0)
Average days | Min days | Max days (0)
Plume Thistle