In a matrix design, grasses or sedges are the predominant species that cover at least 50 percent of the garden area. The other half is usually covered by a variety of perennials. Planning for 100 percent plant coverage shades out weeds and reduces water evaporation.
Nerad recommends choosing native perennials that will provide year-round color and interesting structural elements.
“Both short and tall grasses like prairie dropseed and little bluestem are great options,” she said. “If the site is shady, it is a good idea to use sedges or other shade tolerant ground covers. Include plants with a variety of heights, shapes and blooming seasons.”
She emphasized that with any landscape change, it is important to evaluate existing site conditions before planting, including noting soil and light conditions and any wet or dry spots in the current landscape.
Nerad also suggests using smaller plant sizes such as 2.5-inch pots or plugs and considering the amount of plants needed to fill a large space. Creating a matrix garden on a budget can be accomplished by using grass seed for the matrix base. “This method may take an extra season to reach the same level of growth as pots, but the end result will be equally impressive,” said Nerad.
To learn more about matrix garden design visit one of the many garden demonstrations in Northern Water’s Conservation Gardens or sign up for a garden tour. Additionally, explore these resources from Plant Wild, Monarch Gardens and Horticulture Magazine.