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Cassis Yarrow

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Cassis Yarrow

Achillea millefolium 'Cassis'
24 inches high x 20 inches wide
Zone 4
Full Sun to Part Shade

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This is the winner of the Fleuroselect Quality Mark Award! This clump forming yarrow has masses of attractive, intense deep red flowers throughout most of summer going into autumn. Great for the perennial bed or xeric garden. Flowers can be used in cut flower arrangements.

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Throughout this site, the following are used as guidelines for watering established plants:

water_drops_icon  These truly xeric plants can live with our 12 inches of natural annual precipitation and only need a winter watering during a multi-year drought, but they will thrive with a monthly watering. Overwatering will kill some of these.
water_drops_iconwater_drops_icon  These plants are adapted to intermittent deep watering with soil drying to a depth of a few inches between waterings. Watering frequency may be every couple of weeks during the active growing season and maybe only one winter watering for optimal care.
water_drops_iconwater_drops_iconwater_drops_icon  These plants need regular watering somewhat like a bluegrass lawn so that they never dry to depth in the root system during the active growing season, and need occasional winter watering to prevent root dessication and resultant plant death.
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