Blue Flax vs Hairy Golden Aster - TreeTime.ca

Blue Flax vs Hairy Golden Aster

Linum lewisii

Heterotheca villosa

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Blue Flax
Hairy Golden Aster

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.

Hairy Golden Aster is a native perennial wildflower known for its clusters of bright yellow, daisy-like blooms. They bloom from mid-summer into fall, providing late-season colour and a valuable nectar source for pollinators, including a variety of bee species.

Flowers mature into fluffy seed heads and can self-seed readily. Removing spent blooms helps manage their spread, but some people will choose to leave a few seed heads to provide food for birds. Hairy Golden Aster grow in bushy clumps, tolerates poor sandy soils, and once established, are among the most drought-tolerant wildflowers. 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.

Blue Flax Quick Facts

Hairy Golden Aster Quick Facts

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

Toxicity: toxic to some animals, raw seed toxic

Flowers: pale to deep blue-violet
Flowers: bright yellow, daisy-like
Bloom time: late spring to mid summer
Bloom time: mid summer to early fall
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Other Names: lewis flax, lewis wild blue flax, prairie flax, wild blue flax
Other Names: hairy false golden aster, hairy false goldenaster, hairy goldenaster