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Considered to be an invasive weed to some gardeners, common yarrow has many desirable traits that make it well-suited to the Iowa garden. It is a perennial that is cold tolerant (it will survive to USDA Hardiness Zone 3), spreads rapidly, and can even survive drought. In order to keep it from overrunning your garden, simply pull up large masses of common yarrow every week or so after it begins flowering in early summer. If you are looking for a plant that is easy to grow and prolific, common yarrow is an excellent choice.

Please note that the Zones listed above are USDA Hardiness Zones and are only given as a rough indication of whether a plant will grow and thrive in your area. Temperature variations and unusual weather conditions can affect plant survival. To assist plant survival during the winter, you may wish to place mulch over the areas in question or plant the flowers in an area away from walls or cement. Additionally, digging up bulbs and roots to overwinter indoors may be preferrable to keeping them in the ground.