Hosta Slim & Trim will form a miniature mound of just 6"-8" in height, with a spread of up to 16", at maturity. It is very unusual in being a mini/small that actually has reasonable blue colour. The diamond shaped leaves are of good substance, not as stiff as Hosta Blue Mouse Ears, but still not bad, and rapidly forms a small, dense clump. Works very well in a collection of minis and once established, is robust enough for the border. A Herb Benedict plant, seedling of Hosta Purple Verticulated Elf. Hosta Slim and Trim is one of the best miniature hostas. It has a mound of blue green narrow, long leaves, a bit cupped, a bit twisted, a bit wavy, and clumps up quickly, and forms a dense clump topped with lavender flowers on 18" scapes in July & August. It is sun tolerant as well as slug resistant.RHS Award Of Garden Merit.