Island alum root grows well throughout the Inland Empire in partial shade and with normal winter rainfall and moderate amounts of 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 winter months marked by an asterisk (*) when rains can provide sufficient moisture and irrigation is not needed. The high and low range of moisture indicates Island alum root can grow with varying amounts of water; higher amounts of water will result in stronger springtime flowering performance and summer foliage character.

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.