Cornflower Zone 5. My perennial cornflower just idd thanks to the database was a 4 inch potted plant that I got either free or for 25 cents at a closeout sale. Perennial cornflower Centaurea montana is a showy 2-foot wide and tall plant that blooms from May to June.
The Centaurea montana our dear friends and most popular cultivated species have purple thistle-like flower heads. Easy to grow heirloom annual. Thistle-shaped flowers contrast with the silvery cast of the leaves and branching stems of this heirloom cornflower.
211 USDA Native Area.
A favorite cut flower it was listed in Buists 1942 catalog but disappeared until the later. 1248 inches tall 1012 inches wide. A favorite cut flower it was listed in Buists 1942 catalog but disappeared until the later. If the coldest winter temperature expected in your area is -15F zone 5 then any plants rated zones 3-5 will survive the winter temperatures in your area.