ACTultra is an ultra-fine, all-natural rock dust that provides readily available nutrients to plant roots for a jolt of nourishment. ACTultra is ideal for houseplants and hydroponics, as the mineral-rich dust is easily taken up by the plants to strengthen them inside and out.

Total Nitrogen <.1% Available Phosphate <.11% Total Potash <.11% Soluble Potash <.16% Calcium 34% Magnesium 1.6% Iron .21% Sodium .19%


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