Knock Out roses are an easy-to-care-for variety of rose bush developed by Texas A& M University. The rose was tested by exposing the rose bush to extreme environmental conditions. The Knock Out rose showed resistance to drought and many of the typical rose diseases. The Knock Out rose is now a very popular garden plant that blooms several times during the growing season. New types of Knock Out roses are available such as a pink variety and a double blooming variety. Keep your knockout roses looking great by following a few simple rules.
Plant your Knock Out rose in a well-drained location that receives at least four hours of full sun each day. Although the Knock Out rose is resistant to many of the fungal diseases that plague a typical rose bush, full sun and good air circulation are still important.
Fertilize your Knock Out rose with a fertilizer specifically for roses. Use only as directed on the fertilizer label. Do not over apply fertilizer to the Knock Out rose as this will create too much tender green growth at the expense of bloom production and will make the plant more susceptible to disease and insect damage.
Prune the Knock Out rose only after a blooming period. Concentrate on cutting off the dead blooms. If the Knock Out rose has grown too large for the space it is planted in, you can cut the bush back by as much as one-half , shearing it into the shape you prefer. However, Knock Out rose bushes grow into a naturally well-rounded and attractive shape so pruning is almost never needed.
Apply a 1- to 2-inch layer of mulch around the root zone of the plant. Leave a one-inch gap between the main trunk of the Knock Out rose and the mulch layer to prevent mildew or fungus from spreading from the mulch to the plant. The mulch will help maintain an even moisture level around the plant and will prevent water from splashing on the leaves.
Water the Knock Out rose bush regularly, as often as once a week, until established then water whenever the bush is going through an extended dry period. Apply water to the root zone only and not over the top of the plant where water can splash from the ground to the leaves and carry disease and mold spores from the soil to the plant.