Cornflower

Centaurea cyanus

Layer 4 · Herbaceous
Attracts pollinators

Status by region

No restrictions recorded in the lists we checked.

Checked against the European Union list (Regulation 1143/2014) · Portugal's national invasive species list (Decreto-Lei 92/2019).

Information based on the cited sources, not legal advice — always confirm your local rules.

About

Annual plant native to Europe, notable for its vibrant blue flowers that attract numerous pollinating insects. It improves biodiversity in vegetable gardens and blends perfectly with meadow areas and flower strips. Tolerates poor soils and short periods of drought.

It can be planted now — September is one of the best months.

See which trees cornflower grows well with

Pick the central tree on your land and see the full guild.

No account needed.

Needs

Water: Low
Light: Full sun
Size: Annual herb up to 0.8 m
Mature diameter: 0.3 m
Soils: Loam, Sandy, Limestone
Climates: Atlantic coast, Inland / Continental, Hot, dry Mediterranean

Calendar

January
February
March — Planting
April — Planting
May — Harvest
June — Harvest
July — Harvest
August — Harvest
September — Planting
October — Planting
November
December

Harvest
Planting

Medicinal use: The petals are edible and used in infusions to relieve eye inflammation and throat irritations.

Where to buy

Grows well with

Central trees this plant has already been paired with.

Cherry tree

Central trees worth considering

May work well together — same soil and climate, complementary layers. We have not seen this combination in a generated guild yet.

May grow well with

Suggestions worked out from growing conditions — same soil and climate, complementary layers and functions. These are not observed guilds; treat them as a starting point to try on your own land.