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Masterblend 4-18-38 Tomato & Vegetable Formula
★★★★½4.7 / 5
~$20 for 1 kgBuy now on Amazon (opens in new tab)About this product
The powder base for the Masterblend three-component system described in this article — mixes with calcium nitrate and Epsom salt at $0.02–0.05 per gallon.
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