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A picture of a Perennial Cornflower

Perennial Cornflower

Centaurea montana

Also known as

Great Blue-Bottle, Cornflower, Mountain Bluet, Mountain Centaury, Mountain Cornflower, Mountain Knapweed, Montane Knapweed, Mountain Starthistle

Full Sun
Easy care
Moderate watering
Frost Hardy


USDA zone


Minimum temperature

Expected size








2 years to reach maturity


  • spring
  • summer
  • autumn
  • winter

More images of Perennial Cornflower

A close up of a blue and red purple Centaurea montana flower
A close up of a blue and red purple Centaurea montana flower
A blue Centaurea montana flower on a plant with green leaves
A photo of Perennial Cornflower
A photo of Perennial Cornflower

Perennial Cornflower Overview

Centaurea montana is a perennial species in the daisy family, Asteraceae (Asteraceae). It has simple leaves which may be entire or have lobes and the undersides are covered in hairs. Attractive, interesting blue flowers are produced from late spring through to summer, these tend towards a purple-red colour in the centre and have whispy, thin petals which taper to multiple, feathery points at the ends. This species has earnt a Royal Horticultural Society (RHS) Award of Garden Merit. It is also part of the RHS “Plants for Pollinators” initiative to showcase plants which support pollinator populations by providing ample amounts of nectar and/ or pollen. A great choice for encouraging pollinating insect wildlife into your garden!

Common problems with Perennial Cornflower

How to propagate Perennial Cornflower



Divide in spring or autumn.

Special features of Perennial Cornflower

Attractive flowers

Attracts useful insects

Honeybees, solitary bees, bumblebees, hoverflies, moths, butterflies

Other uses of Perennial Cornflower

Border, naturaliser, cutting bed, rock-garden. Spring/summer interest. This plant suits being included in planting schemes for exposed or sheltered locations with any (north, south, east or west-facing) aspects

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