When to Plant Knockout Roses in Cold Weather: Missouri Fall Planting Guide

Fall Planting vs. Overwintering Potted Roses in Barnett, Missouri

A gardener received a healthy potted Knockout rose in fall with cold weather approaching and rocky soil, unsure whether to plant now or wait until spring.

Fall Planting Advantages

Roses can be planted whenever soil isn't frozen solid. Roots grow at 40°F soil temperatures. Knockout roses are very hardy.

If planting now:

• Plant with graft union (or base of canes for own-root) 4 inches below soil
• Mound 12 inches of compost/soil over base for winter protection

Overwintering in Pot (If Too Cold)

1. Leave outside until leaves drop (needs cold for dormancy)
2. Move to unheated garage (no light needed)
3. Water monthly—keep soil damp, not wet
4. Plant after last hard frost in spring

Rocky Soil Amendment

Dig wide holes, remove rocks, amend with compost. Fall planting gives roots all winter to establish before summer heat.