Blue Flax
Linum perenne
Last reviewed: October 2026
Blue Flax (Linum perenne) is a perennial forb. It blooms in May, June, and July. The flowers draw bees and butterflies.
Toxicity unknown
Blue Flax (Linum perenne) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
12"–24" H × 12"–18" W
Bloom
May, Jun, Jul
Pollinators
bees, butterflies
Native alternatives to Blue Flax
Blue Flax is not native to the United States. These natives fill a similar role in a planting, matched on bloom season, bloom color and mature size.
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 459 programs across 44 states, each with a link to the provider and the date we last checked it.
Find rebates in your areaPicture natives in your own yard
Wondering what could grow where Blue Flax is now? Upload a photo of the spot and Patch Vision shows a rendering of it replanted with natives for your region.
Blue flax produces delicate sky-blue flowers on slender stems from late spring through summer. This compact perennial has fine, narrow leaves and a graceful, airy appearance that works well in prairie-style gardens and rock gardens.
Growing Blue Flax
Grow Blue Flax in full sun and low water. Mature plants reach 12 to 24 inches tall and spread 12 to 18 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Blue Flax takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: front yard, foundation, street edge, mid zone.
- Individual flowers last only one day
- Can appear sparse when not blooming
Wildlife value
The bright blue flowers attract native bees and butterflies throughout the blooming season. Seeds provide food for birds, particularly goldfinches.
Common questions
- When does Blue Flax bloom?
- Blue Flax blooms from May through July, producing small, five-petaled blue flowers that open in the morning and typically drop by afternoon.
- What pollinators visit Blue Flax?
- Blue Flax attracts various native bees and butterflies. The flowers provide nectar and pollen for these important pollinators during the summer months.
- Where is Blue Flax native?
- Blue Flax is native to Minnesota and other northern Great Plains states, where it grows naturally in prairies and open grasslands.
- How much water does Blue Flax need?
- Blue Flax is very drought tolerant once established and requires minimal watering. It performs well in dry conditions and can struggle in overly wet soils.
- Is Blue Flax HOA-friendly?
- Blue Flax takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Blue Flax? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.