Plant Base Online (beta)
common name: Cornflower, Mountain Knapweed, Mountain Bluet
growth rate: fast
leaf colour: green
flower colour: blue
main season: Summer
full sun, part shade
preferred soil pH: neutral-alkaline
minimum temp: -35°C
USDA zone: 4 to 8
Rhizomatous, mat forming perennial. The mid-green leaves may be slightly toothed and are woolly underneath. Woolly stems bear attractive buds opening to purplish-blue flowerheads, from late spring to midsummer.
Well drained soil in full sun or part shade.