Down To Earth™, Rock Phosphate 0-3-0, All Natural, Single Ingredient (5 LBS.)
$10.99
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Soft rock phosphate, or colloidal phosphate, is a natural, untreated source of long-lasting phosphate and soil-building calcium. Phosphate will remain available across a wide pH range. For best availability, soft rock phosphate should be mixed into soil or compost prior to planting. OMRI Listed®.
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