Silky Lupine vs Blue Flax - TreeTime.ca

Silky Lupine vs Blue Flax

Lupinus sericeus

Linum lewisii

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Silky Lupine
Blue Flax

Silky Lupine is a native perennial wildflower known for its upright spikes of blue to violet flowers. Blooming from late spring into summer, the nectar-rich, showy blossoms attract a variety of pollinators, especially bees and butterflies. The plant’s fine, silky foliage provides soft texture and visual interest, enhancing landscapes throughout the growing season.

Silky Lupine is a nitrogen-fixing plant that enriches soils and supports surrounding vegetation. Its deep roots stabilize soil, and it spreads naturally by ejecting seeds from drying pods. If spread isn’t desired, new seedlings are easy to remove. While it is foraged by some wild animals, it contains alkaloids that are toxic to livestock. Silky Lupine is well-suited to pollinator gardens, naturalization plantings, erosion control, and ecological restoration projects.

Blue Flax is a native perennial wildflower known for its blue to violet flowers. Each flower lasts just a single day, but new blooms appear continuously, providing weeks of colour. This extended flowering period provides a reliable display from late spring into summer and attracts a variety of pollinators.

They can self-seed readily, so removing spent blooms helps manage their spread. Birds feed on the seeds, and when cooked, they are edible and are described as having a mild, nutty flavour. The plant grows in loose clumps with slender stems and fine foliage. Young plants are leafy, but as they mature, most leaves are shed.

Blue Flax grows well in a wide range of soils, including poor or sandy conditions, and is drought-tolerant once established. The deep root system helps to stabilize soil and prevent erosion. They are well-suited for pollinator gardens, restoration, naturalization, and xeriscaping projects.

As a perennial, it dies back to the crown each winter, it will regrow from the base in the spring. Avoid disturbing the crown during late winter to ensure healthy growth the following season.

Silky Lupine Quick Facts

Blue Flax Quick Facts

Zone: 4a
Zone: 3a
Height: 0.6 m (2.0 ft)
Height: 0.6 m (2.0 ft)
Spread: 0.5 m (1.5 ft)
Spread: 0.3 m (1.0 ft)
Light: any
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: medium
Growth rate: fast
Life span: short
Life span: short
Growth form: clump-forming
Growth form: upright, rounded, clump-forming
Spreading: seeds - high
Spreading: seeds - high
Maintenance: medium
Maintenance: medium

Toxicity: toxic to sheep and other livestock

Toxicity: toxic to some animals, raw seed toxic
Foliage: Silky-haired, palmately compound leaves
Flowers: Blue to violet pea-like flowers
Flowers: pale to deep blue-violet
Bloom time: mid to late summer
Bloom time: late spring to mid summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC
Native to: AB, BC, SK, MB, ON, YT, NT, NU
Other Names: lewis flax, lewis wild blue flax, prairie flax, wild blue flax