Growing a Knockout Rose in a Balcony Container: Pot, Soil, and Fertilizer Guide

Gardener wants a potted Knockout for mother's NJ balcony (full afternoon sun). Garden center recommended Knockout. Asked about container care.

Container Specs

• 18-inch deep plastic pot (plastic doesn't bake roots like ceramic).
• Sterile potting soil (heated, no pathogens).
• 1/4 cup Osmocote 14-14-14 slow-release at planting.
• Mulch top to retain moisture and cool roots.
• Weekly deep watering.