Cornflower Annual Or Perennial. It is a little larger and very blue and the foliage is greener. 17022021 The Centaurea genus includes a number of annual and perennial species that are commonly known as cornflowers or bachelors buttons.
They look great in beds and borders especially when part of an annual bedding display or a cottage garden flowering from late spring and summer into autumn. This attractive perennial plant features showy blue fringed flowerheads 2 in. Moschata sweet sultan a hardy annual or biennial with red-purple pink yellow or white scented fluffy flowers.
In the garden trade the name bachelors button.
Department of Agriculture plant hardiness zones 3 through 8 perennial cornflower is also called mountain bluet. Blue purple yellow pink white depending on the variety. Each head encased is by a ring of the brightest blue slender ray petals. Perennial cornflower Centaurea montana is a showy 2-foot wide and tall plant that blooms from May to June.