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Are Coffee Grinds Good for Gardenias?. Gardenias prefer acid soil and won't grow well in alkaline soil. If your soil is alkaline, either grow gardenias in pots or add amendments to garden soil to improve the pH to more acidic levels.

Table of contents Are Coffee Grinds Good for Gardenias?
Organic Matter 00:34
Acidity 00:50
Natural Fertilizer 01:11

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