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FloraMicro is the nitrogen-and-calcium base bottle of General Hydroponics' three-part FloraSeries, used with FloraGro and FloraBloom to build a complete feed in hydroponics, potting mix or in-ground soil. It carries an NPK of 5-0-1 plus chelated iron, calcium and trace elements, and it is a synthetic, non-OMRI formula. The best new price is $8.95 for a 1-quart bottle at HTG Supply as of November 6, 2026, with 5 stores listing it new.
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Availability unknownSold by voodoodepotgarden (99.5% positive, 4,700 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
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Lowest price we've seen: $8.95 on Nov 7 at HTG Supply. Tracked across 11 stores since Nov 7.
FloraMicro is a staple of the FloraSeries and most owners treat it as a reliable calcium and nitrogen source. Complaints center on it being only one part of a three-bottle system and on mixing order when it is combined with other nutrients.