Photo by Melody

PlantFiles: Big-Leaf Yarrow
Achillea macrophylla

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Achillea (ak-ih-LEE-a) (Info)
Species: macrophylla (mak-roh-FIL-uh) (Info)

Category:
Alpines and Rock Gardens
Perennials

Height:
24-36 in. (60-90 cm)

Spacing:
24-36 in. (60-90 cm)

Hardiness:
USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:
Full Sun

Danger:
N/A

Bloom Color:
White/Near White

Bloom Time:
Mid Summer
Late Summer/Early Fall

Foliage:
Herbaceous
Silver/Gray
Aromatic

Other details:
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Non-patented

Propagation Methods:
By dividing the rootball

Seed Collecting:
Bag seedheads to capture ripening seed
Allow seedheads to dry on plants; remove and collect seeds

Click thumbnail
to view:

By arsenic
Thumbnail #1 of Achillea macrophylla by arsenic

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive paracelsus On May 16, 2010, paracelsus from Elmira, NY (Zone 6a) wrote:

I've been growing this plant for a couple years now; got it at the Ithaca plant sale. I think it actually gets quite a bit taller than 3ft. Mine is already that tall and the flowering stalks have not yet arisen for the year (it's May). I also think it does not especially like full sun; mine is in full sun and regularly wilts when it gets warm. I have been intending to move it to shade. The supplier's site also says that it gets 5-6ft tall, which I think might well be true when it's mature, and that it prefers shade.

The leaves are wonderful. They are very large indeed and smell like regular yarrow leaves. I have not noticed the plant producing a lot of volunteers or traveling, although it has bloomed for two years now.

Regional...

This plant has been said to grow in the following regions:

Southport, New York



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