Yarrow vs Nodding Onion - TreeTime.ca

Yarrow vs Nodding Onion

Achillea borealis (Previously Achillea millefolium)

Allium cernuum

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Yarrow
Nodding Onion

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.

Nodding Onion is a native perennial wildflower known for its nodding clusters of flowers that range in color from white to pink to purple. The lightly scented blooms provide pollen and nectar for pollinators, especially bees, which can collect while hanging upside down, a capability most other insects lack.

The narrow, grass-like leaves of the Nodding Onion can be used as a seasoning in cooked dishes, though bulbs and raw leaves should not be eaten in large quantities. All parts of the plant have an onion-like aroma when bruised, which helps deter deer and rabbits. They can self-seed readily, so removing spent blooms helps manage their spread. Tolerant of a range of soils, including alkaline, it is well-suited for a variety of plantings, including pollinator gardens and naturalization projects.

Yarrow Quick Facts

Nodding Onion Quick Facts

Zone: 3a
Zone: 3a
Height: 0.3 m (1.0 ft)
Height: 0.3 m (1.0 ft)
Spread: 0.9 m (3 ft)
Spread: 0.2 m (0.5 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: upright to spreading, clump-forming
Spreading: seeds - high
Suckering: none
Maintenance: medium

Toxicity: toxic to dogs, cats, and horses

Toxicity: raw leaves and bulbs can be midly toxic
Foliage: smells of onion when crushed, edible
Flowers: clusters of white flowers
Flowers: white, pink, or purple nodding clusters
Bloom time: late spring to early summer
Bloom time: late spring to summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU, PE
Native to: AB, BC, SK, ON
Other Names: common yarrow, devils nettle, milfoil, western yarrow, white yarrow
Other Names: ladys leek, nodding wild onion