Pittsburgh, PA gardener kept a Knock Out tree rose in a pot indoors over winter (bloomed continuously). Planted in ground early May; by June 23, no foliage or growth. Stem and branches don't look dead.
The rose was acclimated to warm indoor conditions—no cold hardiness developed. Planting into cold spring soil induced severe stress.
Tree roses are especially vulnerable to this transition. If it leafs out later, protect heavily next winter.
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