Common yarrow is one of the easiest plants to grow in Inland Empire gardens in areas of partial shade to full sun and when sustained with low summer water. The chart shown below provides a recommended baseline guide to the monthly irrigation schedule and volume of supplemental water needed to maintain healthy growth throughout the average year. It should be noted there are several months indicated by an asterisk (*) when winter rains can provide sufficient moisture and irrigation is not needed. The high and low range of moisture indicates it can grow with varying amounts of water and you should make irrigation adjustments based on field observations of growth and character. The high end of this moisture range is recommended when this yarrow is planted as a lawn substitute to help sustain better foliage character under sunny conditions and with foot traffic.

For more information on how to use this Irrigation Schedule and Graph, follow this link.

For information how to calculate your irrigation system’s schedule and precipitation rate, please follow this link.