Rejuvenating an Aging Princess Diana Rose: Pruning and Fertilizer Adjustment

10-year-old Princess Diana rose: originally flowered heavily once, then stems only. Last 2 years: stems only, no flowers.

Two Fixes

Hard prune to 18 inches—old canes lose flowering capacity.
Stop high-nitrogen fertilizer. It promotes leaves over flowers. Use tomato fertilizer (high phosphorus) next year per mature plant rate.

Roses: Finding a Replacement for Terosa Organic Rose Fertilizer; Starting Rose Seeds: Warmth, Not Fridge, for Germination; Winter Protection for 'Apricot Princess' Roses in Zone 4; Winter Protection for 'Apricot Princess' Roses in Wisconsin Zone 4b; Princess Diana Rose: Bloom Cycle and Pruning Guide for New Gardeners; 'Diana, Princess of Wales' Rose: Color Description and Photo Source; Rosa 'Diana, Princess of Wales' – Elegant Hybrid Tea; Clematis 'Princess Diana': Pink Tulip-Shaped Flowers; Rose Of Sharon 'Diana': Long Blooming Season with Superior Flowers; Clematis 'Princess Diana': Red Tulip Shapes with Cream Centers

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