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Why Geranium Flower Color Shifts After Planting: Light Intensity vs. Soil pH

Geraniums don’t change color with soil pH like hydrangeas. Your shift from red/magenta/purple to orange-red is due to direct sun vs. greenhouse diffuse light. Greenhouse plants are also heavily fertilized. Try a slightly stronger liquid fertilizer after watering, but the color change is primarily light-driven.

Annuals: Changing Hydrangea Flower Color: Blue vs. Pink vs. White Varieties; Phalaenopsis Color Change: Two Plants or Pigment Migration?; Joseph's Coat Rose Turned Red: Winter Kill and Rootstock Takeover; Why Your Sarracenia and Venus Flytraps Lack Red Color in a Greenhouse; Dracaena marginata Yellow Tips: Overwatering or Hard Water; Why Did My Pink Hydrangea Turn Blue? Soil pH Explained; Is That a Geranium Tree? Hardy Pelargoniums in Southern Oregon; Using Barley Straw to Control Late-Season Algae in a Canadian Pond; When Do Bell Peppers Change Color?; Rose Flowers Turned Red? Rootstock Took Over

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