Knock Out Roses Not Blooming? Deadhead, Prune, and Feed Potassium

Knock Outs often slow down at 3–5 years when they reach 6+ feet. The fix is simple:

Three-Step Restart

1. Deadhead religiously: Remove spent blooms (hips) to prevent energy diversion to seed production.
2. Light pruning: Remove 10–20% of growth anytime—stimulates new flowering wood.
3. Feed potassium: Time-release fertilizer every 3 months. Bonus: bury banana peels at the base—roses love the potassium boost.

Check the Basics

• 6+ hours full sun?
• Deep watering 2×/week?
• White powder on leaves = powdery mildew (treat with fungicide).

White leaf coating suggests mildew—address that too. But usually, Knock Outs just need a haircut and a banana.