number : 5 tot 7 per m2
- little groups of 3 to 10 plants (B) - groups of 10 to 20 plants, even more (C)
Plant description
Knautia is a fairly easy perennial to grow, making the care of Knautia plants minimal. A little water, sun, and well-drained soil are all it really needs. Knautia actually prefers poor soil.