Achillea Species, Northern Yarrow

Achilleaborealis

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Achillea (ak-ih-LEE-a)
Species
borealis (bor-ee-AL-is)
Synonym
Achillea millefolium var. borealis
Sun Exposure
Full Sun
Foliage
Herbaceous
Shiny/Glossy
Succulent
Height
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
Spacing
6-9 in. (15-22 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)
Danger
N/A
Bloom Color
White/Near White
Bloom Time
Mid Summer
Late Summer/Early Fall
Other Details
Category
Alpines and Rock Gardens
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Bronze
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
May be a noxious weed or invasive
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
From seed; direct sow outdoors in fall
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Seward, Alaska

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Gardener's Notes:

1
positive
1
neutral
0
negative
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P
(Zone 8b) | March 2005 | neutral

This yarrow has more of a greyer tinge on its folisge than other yarrows. pokerboy.

W
Seward, AK (Zone 3b) | January 2003 | positive

Achillea borealis grows wild all along the roadsides and open meadows throughout most of Alaska. The typically white flat flower heads ma...Read More

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