When you add a Knockout rose shrub to a sunny growing area, you quickly see how these roses got their name. With their prolific blooms and energetic growth, a Knockout rose bush quickly grows into a healthy specimen plant within only a few months of planting. Growing roses in a home landscape often provides a gardener with fresh roses for making flower arrangements. Although the stems of Knockouts are slender and fragile, with care you can cut Knockout roses for arrangements.
Fill the bucket approximately halfway with cool water, and take it out to the Knockout rose bush with you to hold the rose stems as you cut them.
Clip the rose stems from the bushes with the pruning shears, placing the cuts 1/4 inch above a leaf node. Cut the stems off at the length you require for your arrangement.
Place each cut stem into the bucket immediately after you clip it from the shrub. Continue cutting until you have the number of stems you need for your arrangement.
Take the bucket inside, and place it in a cool and dark location (a refrigerator is ideal) for two to three hours. If you lack refrigerator space, a cool and dark basement would suffice.
Place the Knockout stems into a cut arrangement after they sit for the recommended time.