Yellow Hedysarum vs Blue Flax - TreeTime.ca

Yellow Hedysarum vs Blue Flax

Hedysarum sulphurescens

Linum lewisii

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Yellow Hedysarum
Blue Flax

Yellow Hedysarum is a native perennial wildflower recognized for its clusters of pale yellow to creamy-white, pea-like blooms. Flowering from late spring into summer, it adds subtle colour to grasslands, roadsides, and open woods while attracting a variety of pollinators, especially bumblebees.

As a nitrogen-fixing plant, Yellow Hedysarum enriches soils and supports the growth of surrounding vegetation. Its deep taproot and extensive root system make it drought-tolerant and effective at stabilizing soil. Grizzly bears are known to dig up and eat the nutritious taproot. Its resilience and ecological value make it well-suited for restoration, naturalization, pollinator gardens, and erosion control 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.

Yellow Hedysarum Quick Facts

Blue Flax Quick Facts

Zone: 2b
Zone: 3a
Height: 0.5 m (1.5 ft)
Height: 0.6 m (2.0 ft)
Spread: 0.2 m (0.8 ft)
Spread: 0.3 m (1.0 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Growth form: ascending to upright
Growth form: upright, rounded, clump-forming
Spreading: seeds - low
Spreading: seeds - high
Maintenance: medium


Toxicity: toxic to some animals, raw seed toxic
Flowers: creamy yellow, in dense spikes
Flowers: pale to deep blue-violet
Bloom time: late spring to 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: sulphur hedysarum, sulphur sweet-vetch, yellow sweet-vetch
Other Names: lewis flax, lewis wild blue flax, prairie flax, wild blue flax