Determine the location where you would like to plant your Knock Out rose bush or bushes. In addition to spacing also consider the light and drainage requirements of the plant.
Measure five feet from the closest structure, tree, plant or other stationary object. Knock Out roses are capable of growing, when not trimmed, to five feet in width. Knock Outs also grow quickly in some cases and this can lead to problems if the roses are planted too closely to other plants or objects.
Measure four feet from the nearest plant, tree or object using a tape measure. Place a stick or rock at the four-foot mark and step back to survey the area. Make any adjustments in location until you feel this is a good location based on distance, light and drainage.
Dig a hole for planting the Knock Out rose with a shovel. Check the distance once again from the edge of the hole to the nearest object or plant. Make sure you still maintain a distance of about four feet.