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This all natural
Pressure: 6
Includes micronutrients
and perlite is included to provide air spaces in the media
Roots HPK Quart Indoor Grow Equipment This all naturalRoots Organics HPK liquid bloom booster features a combination of phosphate rock, an unparalleled source of available natural phosphorus, and langbeinite, a natural source of potassium that is carefully mined from ancient sea beds in the deserts of the American Southwest. Aurora Innovations has taken generations of gardening experience and distilled it into a distinctive, easy to use formula for the home and professional gardener. Roots Organics HPK