In June 1991, a two year field study was initiated to examine if three non-turf groundcovers with reputations for using low amounts of water actually use less water than Kentucky bluegrass (KBG). Irrigation treatments were based on percentages of ET (100%, 75%, 50%, 25%, 0%) and calculated by the modified Penman equation. Results from the 1991 season indicate that at the 100% and 75% treatments Potentillatabernaemontani and Cerastiumtomentosum were significantly better than the other species in terms of establishment and vigor but quality declined significantly at rates below 75%. At the 50% rate both KBG and Sedumacre maintained good quality although growth was slow. At the 25% rate, quality of KBG significantly declined while Sedumacre maintained good quality. Quality of Sedumacre declined only slightly at the 0% treatment and would be a good alternative to KBG if water conservation was a high priority in the landscape.
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