Bright yellow flowers open on multi-branching stems above thick leathery (presumably caltha or "kingcup" like) leaves which are differently shaped depending on where they grow on the plant, the upper ones being lobed and blunt-toothed, while the lower leaves kidney or rounded heart-shaped and coarsely toothed. This unusual hardy plant is from N.W. North America and is completely new to us.
Sow immediately at any time onto preferably a soil-based compost, covering with fine grit to approximately their own depth. Germination MAY be quicker if kept at 15 to 20 degrees C. but many seeds WILL NOT come up the year they are sown, needing winter chilling after sowing, and ONLY come up with natural spring germination.
Common name:Caltha-leaved avens