The Knock Out family of roses, bred by Bill Radler, are award winners, both on the show circuit and with gardeners. Knock Out roses are very easy to care for, disease resistant and cold tolerant (hardy to USDA Plant Hardiness Zone 5). Wait until the ground is completely frozen to prepare the Knock Out rose tree for the rest of the winter.
Withhold fertilizer in August and discontinue deadheading Knock Out roses in October. This will encourage the Knock Out rose to produce hips and go dormant.
Remove all foliage from your Knock Out rose.
Mound a 5- to 6-inch layer of wood mulch around the base of the Knock Out rose after the first hard frost. Be careful not to apply the mulch too early. The ground must be frozen.
Spray the branches of your Knock Out rose with dormant oil to control any pests that may overwinter on the plant.
Drive three or four stakes into the soil surrounding your Knock Out rose. Wrap burlap around the stakes and staple or nail the burlap to the stakes. You can also loosely wrap burlap around the tree, then wrap it with twine to hold the burlap in place. Keep the wrapping loose to allow air to circulate around the rose bush.