Blue Flax vs Lewis Mock Orange - TreeTime.ca

Blue Flax vs Lewis Mock Orange

Linum lewisii

Philadelphus lewisii

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Blue Flax
Lewis Mock Orange

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.

Lewis Mock Orange is a flowering ornamental shrub that produces an abundance of white, fragrant blooms. The flowers have a sweet scent similar to orange blossoms, with a hint of pineapple. They bloom for several weeks from late spring to early summer, attracting pollinators and other beneficial insects.

Native to North America, Lewis Mock Orange is found from the southernmost portions of Alberta and British Columbia, and south into the northwestern United States. It makes an attractive shrub and can be used in hedgerows, pollinator gardens, and naturalization projects. Blooms occur on the previous year’s wood, so it is recommended to prune after it has finished flowering.

Blue Flax Quick Facts

Lewis Mock Orange Quick Facts

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Zone: 3a
Zone: 4a
Height: 0.6 m (2.0 ft)
Height: 3 m (10 ft)
Spread: 0.3 m (1.0 ft)
Spread: 2.4 m (8 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: fast
Growth rate: medium
Life span: short
Life span: medium
Growth form: upright, rounded, clump-forming
Growth form: upright to arching, multi-stemmed
Spreading: seeds - high
Spreading: suckering - medium, seeds - low
Maintenance: medium

Toxicity: toxic to some animals, raw seed toxic

Flowers: pale to deep blue-violet
Flowers: fragrant, white
Bloom time: late spring to mid summer
Bloom time: mid spring to early summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, ON, YT, NT, NU
Native to: AB, BC
Other Names: lewis flax, lewis wild blue flax, prairie flax, wild blue flax
Other Names: california mock orange, lewis mockorange, western mock orange, western syringa, wild mock orange