Mountain Bluet plant profile
Centaurea montana
A perennial flower for full sun.
Last updated .
When to plant
When to plant Mountain Bluet
Mountain bluet (perennial bachelor's button) is a clump-forming perennial best planted in spring, the standard window for hardy perennials. NC State notes it is easily grown in average, dry-to-medium, well-drained soil in full sun and needs dividing every two to three years.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Mountain Bluet in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Lifecycle
- Perennial
- Hardiness
- Zones 3a to 8bFind my hardiness zone
Next steps
Continue with Mountain Bluet
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Centaurea montana (Mountain Bluet, Perennial Bachelor's Button, Perennial Cornflower)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.