Photo by Melody

PlantFiles: Blue Flax
Linum perenne 'Sapphire'

Family: Linaceae
Genus: Linum (LIN-um) (Info)
Species: perenne (per-EN-ee) (Info)
Cultivar: Sapphire
Additional cultivar information: (aka Blau Saphir, Nanum Sapphire)

Synonym:Linum perenne nanum

3 vendors have this plant for sale.

9 members have or want this plant for trade.


12-18 in. (30-45 cm)

15-18 in. (38-45 cm)

USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Parts of plant are poisonous if ingested

Bloom Color:
Medium Blue

Bloom Time:
Late Spring/Early Summer


Other details:
Drought-tolerant; suitable for xeriscaping
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Properly cleaned, seed can be successfully stored

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2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive troop1819 On Apr 14, 2010, troop1819 from Lees Summit, MO wrote:

Have had several of these in full sun in the midwest for several years. They will propagate by self seeding but need sun to get going, last couple of years my beds were too full and they did not propagate and several died off. I purchased several more for this year's garden, as I like that they have a longer flowering season than most perennials, especially if you trim them back some after blooming.

Positive Handyman67 On Mar 2, 2010, Handyman67 from Columbus, OH wrote:

Grows well in sun to part shade, flowers are a very pale sky blue on light to silvery green fine leaved foliage reminiscent of asparagus fern, blooms from spring to first frost. Blooms have a tendency to drop petals in high heat. Self seeds somewhat, and can be somewhat floppy after rain, does well with little to no care after established.


This plant has been said to grow in the following regions:

East Haddam, Connecticut
Plainfield, Illinois
Lees Summit, Missouri
Hudson, New Hampshire
Port Norris, New Jersey
Hilton, New York
Nineveh, New York
Pennsburg, Pennsylvania
Wilkes Barre, Pennsylvania
Houston, Texas
Salt Lake City, Utah

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