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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) USDA Zone 9a: to -6.6 °C (20 °F)
Other details: May be a noxious weed or invasive This plant is attractive to bees, butterflies and/or birds Drought-tolerant; suitable for xeriscaping Average Water Needs; Water regularly; do not overwater This plant is resistant to deer
Soil pH requirements: 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral)
Propagation Methods: By dividing the rootball
Seed Collecting: N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
On May 25, 2008, straea from Somerville, MA wrote:
Planning a xeric-centric garden last year, one of the things I focused on was silver-leaved plants. Thus, one of the first things I planted was 'Moonshine'. It has done stupendously in harsh conditions - slope, hot, dry, windy, poor soil, right by a busy road. I planted two last year and both did well last year - the one further up the slope actually doing BETTER than the one a bit down it! - and have survived the winter (winter-kill being more common than I would have originally expected with yarrows here). When I went on vacation to New Mexico I saw this particular cultivar planted in literally nearly every landscaping design, from big public ones to small home gardens - so I imagine it's as xeric in other conditions as it has been for me here. I've heard others complain that it has a tendency to flop for them, but I've never had that problem here, and other things certainly flop in the strong wind. I don't know what the difference is - perhaps the others are planted in soil that's too rich for yarrow?
On Apr 28, 2008, outdoorlover from Enid, OK (Zone 7a) wrote:
Mine gets to be 24 to 30" tall and requires fencing to hold it up, probably due to a little more water and feed than it likes normally. Still a beautiful multi-season plant.
On Sep 18, 2007, BlackDogKurt from Seymour, CT wrote:
Great looking flowers. The yellow contrasts strikingly with some Sarastro Camanula blue bellflowers planted next to them. And the silvery green foliage makes an interesting look even when they are not flowering.
I always deadhead the spent blooms since once they turn brown, they are not very attractive, although I rarely seem to get a new flush of blooms like others have reported. Nonetheless, it is still a winner for me.
On Sep 22, 2005, Scorpioangel from Gold Hill, OR (Zone 7a) wrote:
By far my favorite Yarrow .... the plant stays upright on stout stems, once established likes to be on the dry side, Makes a wonderful dried flower bouquet, the color holds very well when dried.
On Apr 2, 2005, SalmonMe from Springboro, OH (Zone 6a) wrote:
Deadhead faded flowers to lateral flower buds. After all blooms have faded, cut down to basal foliage. Deadheading can prevent the rampant reseeding of this plant. Requires well-draining soil. Does not like wet conditions.
On Dec 20, 2004, hanna1 from Castro Valley, CA (Zone 9a) wrote:
large flat clusers of sulphur-yellow flowers, June to September. Fern-like gray-green leaves. Bright yellow, long lasting. Well drained border. It is self-supporting if not cut back in Fall, the frosted flower heads provide interest in the winter. Average growth. Foliage may aggrevate skin allergies. Fully hardy. Stake blooms using bamboo canes as they are heavy. Lift and divide large clumps in late Fall or in Spring. Mine is blooming right now???
Regional...
This plant has been said to grow in the following regions:
Fayetteville, Arkansas Bakersfield, California Clayton, California Fairfield, California San Jose, California Seymour, Connecticut Panama City, Florida Cordele, Georgia Chicago, Illinois Hampton, Illinois Saint Charles, Illinois Fishers, Indiana Atalissa, Iowa Olathe, Kansas Somerville, Massachusetts Pinconning, Michigan Saint Cloud, Minnesota Omaha, Nebraska Sparks, Nevada Rio Rancho, New Mexico Clinton Corners, New York Port Washington, New York Poughkeepsie, New York Yorktown Heights, New York Belfield, North Dakota Medora, North Dakota Hilliard, Ohio Springboro, Ohio Broken Arrow, Oklahoma Enid, Oklahoma Gold Hill, Oregon Johnsonburg, Pennsylvania Prosperity, South Carolina Knoxville, Tennessee Garland, Texas Richmond, Texas Farmington, Utah Tooele, Utah Clinton, Washington Moxee, Washington Charleston, West Virginia