Achillea yarrow

(a-kill' ee-ah)

Common name: Yarrow

Family: Asteraceae, Aster

Height x width:6-36" x 2-5'

Growth rate: moderate to fast

Foliage:green or gray-green, deeply divided like ferns, often with heavy spicy odor

Flowers: flat-topped corymbs, outer flowers female, inner flowers male and female, various colors

 (photo courtesy: sougriwa, photobucket.com)

Hardiness: zones 3-5 to 8-9

Soil: most if well-drained

Light: sun

Pests and problems: beetles, mites

Landscape habit, uses: borders, containers, massing

Other interest: good for cut or dried flowers, cut when pollen is visible for best vase life; named after Achilles who supposedly used millefolium species for soldiers' wounds

Other culture: some species may be invasive (roots) in some situations except for clump-formers; in zones 7 and warmer plants may get spindly and need staking

Propagation: seeds, division, cuttings

Species:

filipendulina(phil-i-pen-du-lee' nah)--Fern-leaf Yarrow, zones 3-8, 3-5' x 3', flat yellow flowers 3-4" across in summer, foliage is generally green and deeply cut as in ferns, forms clumps

grandifolia(gran-di-fol' ee-ah)--White Yarrow, zones 5-8, 2-4' x 2', flat white flowers 3-4" across in summer, gray-green and lacey 9" leaves, clump-forming

millefolium(mill-i-fol' ee-um)--Common Yarrow, zones 3-9, 1-2' x 5', flat flowers white to cerise red, dark green deeply cut foliage, spreads 1-2' per year, used in medieval Europe as a toothache remedy and instead of hops in ale, variable from seed, hybrids with taygetea form Galaxy series

ptarmica(tar-mi-ka')--Sneezewort, zones 2-9, 1-2' x 1', white flowers in early summer, dark green linear non-dissected leaves, aggressive in good soils, leaves and roots made into a powder in Victorian England and used as substitute for snuff (hence the common name)

tomentosa(toe-men-toe' sah)--Wooly Yarrow, zones 3-7, 6-12" x 18", yellow flowers in early summer, hairy or "wooly" foliage deeply cut and light green, doesn't tolerate heat and humidity
 
 

Cultivars:
 
Cultivars, other taxa species flowers other
'Altgold' filipendulina deep yellow 2' tall
'Apfelblute' (syn.) Galaxy hybrid peach, lilac-pink 2-3' tall
'Appleblossom':'Apfelblute'      
'Apricot Delight' hybrid pink Tutti Fruiti series
'Cerise Queen' millefolium cerise red 1-2' tall
'Cloth of Gold' filipendulina pure yellow 3-4' tall
'Coronation Gold' -- yellow gray-green foliage, 3' tall 
'Flowers of Sulphur':'Schwefelblute      
'Gold Plate' filipendulina deep yellow 3-5' tall
'Great Expectations' (syn.) Galaxy hybrid primrose yellow 2' tall
'Heidi' Galaxy hybrid pastel pink 1-2' tall
'Hoffnung':'Great Expectations'      
'Hope':'Great Expectations'      
'Moonshine' -- lemon yellow gray-green foliage, 1-2' 
'Parker's Variety' filipendulina golden yellow 3-4' tall
'Red Beauty' millefolium cerise red 2' tall
'Salmon Beauty' Galaxy hybrid salmon 2-3' tall
'Schwefelblute' (syn.) -- sulphur yellow slowly spreads, 2' tall
'Schwellenburg' -- lemon yellow silvery foliage, 1-2' tall
'Summer Pastels' millefolium pastels 2' tall, from seed
'The Beacon' Galaxy hybrid rich red, yellow centers 2-3' tall
'The Pearl' ptarmica white, double 2' tall
'Weser River Sandstone' millefolium deep rose-pink 2-3' tall

('Moonshine' photo courtesy tdhnurseries, photobucket.com)


©Authored by Dr. Leonard Perry, Professor, University of Vermont as part of PSS123 course.

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