Scientific Name:
Achillea millefolium
cvs.
Pronunciation:
ack-ih-LEE-uh mill-ih-FOE-lee-um
Common Name:
yarrow cultivars
Family Name:
Asteraceae
Plant Type:
Herbaceous perennial
Key ID Features:
Leaves basal or alternate on flowering stem, fern-like, oblong-lanceolate, most 4-23cm long x 5-12cm wide, appearing 2-3 pinnate with all segments deeply dissected; corymbs of 10-100 heads <1cm wide, ray florets petal-like due to relatively large corollas and only about 5 per head, disk florets tiny and usually 10-20 per head.
Habit:
Spreading
Form:
Mounded
Texture:
Medium - fine
Mature Height:
0.4 - 0.7m
Mature Spread:
0.3 - 0.6m
Growth Rate:
Fast
Origin:
Central / west Asia, Europe, Garden origin, North America (Europe to west Asia)
Hardiness Rating:
Zone 3: (-40 to -34 °C)
Exposure:
Full sun
Soil/Growing Medium:
Rocky or gravelly or dry
Water Use:
Low, Summer dry
Landscape Uses:
Attract beneficial insects, Attract butterflies, Container planting, Cut flower or foliage, Dried flower or fruit, Group or mass planting, Perennial border, Small garden/space, Summer interest
Additional Info:
Google. Cultivars shown or on campus may include:
A. ‘Apple Blossom’ (pink-white),
A. 'Cerise Queen' (deep pink),
A. 'Citronella’ (light yellow),
A. 'Moonshine' (bright yellow),
A. 'Paprika' (red),
A. 'Pink Grapefruit' (deep pink), and
A. 'Strawberry Seduction' (red-yellow),
A. ‘Terracotta’ (orange-yellow).
Note: species can be a nuisance weed (greyish-white).
Leaf Morphology:
Form:
Dissected
Arrangement:
Alternate, Basal
Texture/Venation:
Soft flexible, Pinnate venation
Surfaces:
Distinctive smell
Colour in Summer:
Green, Silver / Grayish
Colour in Fall:
Yellow, Silver / Grayish
Shapes:
Lanceolate
Apices:
Acute
Bases:
Cuneate
Margins:
Incised, Pinnately lobed, Pectinate
Inflorescence Type:
Head (capitulum), Floriferous, Corymb-like
Flower Morphology:
Flowers perfect
Number Of Petals:
5
Corolla Shape:
Ligulate
Ovary Position:
Inferior
Colour (petals):
Showy, White, Orange, Yellow, Violet, Pink, Red, Dark-red
Flower Scent:
Musky, Unpleasant
Flower Time at Peak:
Jul, Aug, Sep
Additional Info:
Ray florets 4-6, pistilate and ligulate
Fruit Type:
Cypsela (achene + calyx)
Fruit Colour:
Brown
Fruiting Time:
Oct, Nov
Bark Morphology:
Smooth
Bark or Stem Colour:
Brown
Organ Modifications:
Rhizomes
Propagation:
Division - below ground parts
Maintenance:
Low
Pest Susceptibility:
Rust (Pest resistant, Deer resistant, Rabbit resistant, Drought tolerant)
Course(s):
- HORT 1193/1293
- HORT 2355
Location(s):
- (AGB) Acer Griseum Bed
- (BCE) Boulevard (Circular) Eastend
- (BUG) BUG garden : cv. Terracotta
- (GAZ) GAZebo
- (GAZN) GAZebo North : cvs. Cerise Queen, Citronella, Moonshine
- (GAZW) GAZebo West : cv. Paprika
- (NRY) NuRserY
- (WLG) WoodLand Garden