Black Locust vs Yarrow - TreeTime.ca

Black Locust vs Yarrow

Robinia pseudoacacia

Achillea borealis (Previously Achillea millefolium)

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Black Locust
Yarrow

Black Locust is an attractive tree. Its distinctive leaves are made of about a dozen bright green leaflets. It also notable for its fragrant white flowers, which smell of citrus.

Black Locust can grow in many situations, but prefers dry areas with lots of sun. It is robust and is an excellent choice for establishing shade in dry, open areas.

Important note: Much of the Black Locust is toxic to humans and livestock, including seeds, bark, and leaves.

Yarrow is a herbaceous, native wildflower that is found across Canada. It features large, flat clusters of tiny white flowers. The blooms attract a variety of pollinators, making it an ideal choice for pollinator gardens. While partial shade is tolerated, the best flowering occurs in full sun. Yarrow is resistant to deer and rabbits, making it both a beautiful and practical addition to your landscape.

The entire plant is edible, but leaves and flowers are most commonly consumed. They have a strong licorice scent and a mild sweet flavor that is similar to tarragon. Yarrow leaves can also be used as a natural insect repellent.

It is important to plant Yarrow in the right place, it can spread quickly via both rhizomes and self-seeding. Deadheading the spent flowers will extend the bloom season and can help limit self-seeding.

Black Locust Quick Facts

Yarrow Quick Facts

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Zone: 3a
Zone: 3a
Height: 12 m (40 ft)
Height: 0.3 m (1.0 ft)
Spread: 8 m (25 ft)
Spread: 0.9 m (3 ft)
Moisture: dry, normal
Moisture: dry, normal
Light: full sun
Light: partial shade, full sun
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no
Flowers: Creamy white flowers in a pyramidal shape bloom in may-june
Flowers: clusters of white flowers
Bark: dark reddish brown to balck with furrows
Growth rate: fast
Growth rate: fast
Life span: long
Life span: short
Suckering: high
Suckering: none




Toxicity: toxic to dogs, cats, and horses
Other Names: false acacia, yellow locust
Other Names: common yarrow, devils nettle, milfoil, western yarrow, white yarrow