Diagnosing Yellowing Gardenias in Clay Soil

Gardenias in amended clay soil show lime-green foliage with unopened buds. Owner considers coffee grounds for acidity. Expert advises: test pH first—don't guess.

Critical Steps

• Test original soil, not amended mix.
• Take soil sample + affected foliage to an independent garden center (not a chain store).
• Local nurserymen know area soils and common issues.
• Water is often the real culprit with gardenias—too much or too little.

Get a professional diagnosis before applying any amendment.