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'Sorcerer' Rose Color Fading: Mineral Deficiency or Rootstock Reversion?

Two Main Theories

Two dozen 'Sorcerer' roses in central Utah (4,800 ft, west exposure, full sun) lose red intensity—looks bleached. Other varieties fine. Label says full sun.

Investigation

Trace mineral deficiency (especially at altitude with intense UV). Feed balanced organic fertilizer.
Rootstock reversion: Check base for suckers with different foliage/flowers. Prune them out.
Neighbor comparison: Do nearby 'Sorcerer' roses fade?

High UV at altitude can bleach pigments if minerals (copper, iron) are lacking.

Roses: Why Roses Change Color: Understanding Sport Mutations in Rose Bushes; Second-Year Roses Not Blooming—Check for Winter Kill; Can You Deepen the Color of a Pale Yellow Rose?; Why Rose Flowers Fade and Die Quickly; All My Roses Turned Deep Red—Rootstock Takeover; Why a Purple Floribunda Turned Red & Pruning Guidelines for New Hampshire; New Rose Bush Produces Miniature Blooms – Heat and Water Stress; Why Rose Colors Fade: Soil, Weather, and Seasonal Influences; Sticky Rose Leaves? Aphid Honeydew and Why Sprays Fail—Try Daily Washing Instead; Transplanted Climbing Rose Sucker: When Will It Flower?

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