Zoysia grass is best adapted to areas that have long, hot summers. Colorado summers are too short and the nights are too cool to allow zoysia grass to establish very effectively. Often zoysia grass is sold in small plugs that are transplanted into an existing lawn. In Colorado, the result is weedy looking because the zoysia grass does not take over the lawn. Only small patches of zoysia grass grow throughout the lawn.
Zoysia grass has definite disadvantages as a lawn grass in Colorado.
Permission is hereby given to duplicate this Plant talk Colorado TM script as is if credit is given to the sources.