How to Grow Knock Out Rose
Rosa 'Radrazz'
Your complete guide to growing Knock Out Rose.
📷 Wikimedia CommonsWhen to Plant Knock Out Rose
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
Companion Plants for Knock Out Rose
✓ Good companions
Sulfur compounds repel aphids, thrips, and other soft-bodied insects
Strong scent deters ants, aphids, and rodents while attracting beneficial insects
Natural fungicide properties help prevent black spot and powdery mildew
Complementary root systems and provides vertical interest without competing
Repels aphids, thrips, and Japanese beetles while improving soil health
Repels aphids, spider mites, and other rose pests while attracting beneficial pollinators
Deters nematodes, aphids, and whiteflies with natural compounds
Attracts hoverflies and other beneficial insects that prey on rose pests
✗ Keep away from
Produces juglone toxin that inhibits rose growth and can cause wilting
Allelopathic properties inhibit growth and development of roses
Compete for nutrients and water while creating excessive shade roses cannot tolerate
