Are Cornflowers Annuals Or Perennials

Are cornflowers annuals or perennials
The seeds thrive in the same conditions as corn; open, sunny fields with moderately dry soil, yet over time, due to over-use of herbicides in cornfields throughout Europe and the US, Cornflowers no longer reseeded themselves naturally.
Are blue cornflowers perennials?
Prized for its flamboyant, rich blue flowers, Centaurea montana (Mountain Cornflower) is an erect, stoloniferous, clump-forming perennial with fringed, blue flowers, 2 in. wide (5 cm), adorned with reddish blue, thistle-like centers from late spring to early summer.
Do cornflowers need to be deadheaded?
Growing Tips Cornflowers are drought-tolerant and easy to grow. It is a great flower to introduce children to gardening. Deadhead cornflowers to keep them flowering.
Where is the best place to plant cornflowers?
Cornflowers like to grow in well drained soil in full sun.
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