perennial

Mountain Bluet

Centaurea montana

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Dry to medium

Humidity

Average

Lifespan

Perennial

Native To

Europe

Toxicity

Non-toxic

The Story

Plant Bio

Centaurea montana, commonly known as mountain bluet or cornflower, is a perennial plant native to Europe, known for its striking blue flowers and ability to thrive in poor soils. This species is notable for its long-lasting blooms and its ability to re-seed itself, making it a reliable addition to garden borders and wildflower plantings.

Uses & Benefits:

Centaurea montana offers attractive, silvery foliage and vibrant blue flowers, ideal for borders and rock gardens.

Its drought tolerance reduces water needs, making it suitable for xeriscaping.

Provides nectar for pollinators such as bees and butterflies, supporting local ecosystems.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds into well-draining soil in early spring for best germination.
Mist cuttings lightly to maintain moisture, avoiding overwatering.
Transplant seedlings when they are sturdy and have developed a strong root system.
Divide mature plants in early spring or fall to promote healthy growth.
Apply a balanced fertilizer every 6 weeks during the growing season.
Mulch around plants to retain moisture and suppress weeds.

Pro Tip

Ensure well-draining soil and full sun for optimal flowering and growth.

Keep It Thriving

Care Guide

Do

Water deeply during dry spells to keep soil moist but not waterlogged 🌱
Prune spent flowers to encourage more blooms.
Fertilize in early spring with a balanced, slow-release fertilizer.

Don't

Avoid overwatering, which can cause root rot ❌
Don’t neglect deadheading to extend flowering period.
Refrain from planting in heavy, poorly-drained soils.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Divide
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Silver-foliaged borderDrought-tolerant perennial bed

Companion Plants

Lavender Coreopsis Echinacea Salvia Yarrow

Multiply

Propagation Methods

Good to Know

Common Questions

Mountain Bluet questions

What zones can Mountain Bluet grow in?

Mountain Bluet is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Mountain Bluet deer resistant?

Yes — Mountain Bluet is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Mountain Bluet bloom?

Mountain Bluet typically blooms in late spring to early summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Mountain Bluet need full sun?

Mountain Bluet does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Mountain Bluet drought tolerant?

Yes — once established (usually after the first full season), Mountain Bluet handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.