For 36-inch summer height, prune to 18 inches in Jan-March. Remove dead/crossing canes. Cut ¼ inch above outward-facing bud. Unpruned reaches 5 ft but looks open.
See Knock Out Rose – Pruning in Summer.

the bud has already sprouted here


Hard Pruning Overgrown Double Knock Out Roses: 2-Foot Renewal Method
Pruning Rose Bushes in Winter: Is It Too Late When Snow Arrives?
Pruning Climbing Roses for Winter: Balancing Holiday Lights and Plant Health
When to Prune Hydrangeas: Winter vs. Summer Timing
Pruning Rose Bushes: A Seasonal Guide to Healthier, More Beautiful Blooms
Blushing Knock Out® Rose 5G: Light Pink Self-Cleaning Blooms, Disease Resistant
Pruning Knock Out Roses for Winter: Height, Timing, and Hedge Trimmer Technique
Blushing Knock Out® Rose 5G: Disease‑Resistant, Self‑Cleaning Light Pink Blooms
Knock Out® Shrub Rose: Maintenance-Free Candy Apple Red Blooms with Disease Resistance
Rainbow Knock Out® Rose: Coral Pink with Yellow Centers, Disease Resistant
Sunny Knock Out® Rose: Continuous Yellow Blooms with Disease Resistance
Copyright © www.100flowers.win Botanic Garden All Rights Reserved