Tomato Fertilizer

Tomato Fertilizer is meant for once-weekly feeding through the growing season, dosed by size: 1 tablespoon per gallon of water while plants are under 12 inches, then 2 tablespoons per gallon once they’re large or carrying fruit. A hose-end sprayer set to the same rates covers full rows. Container and grow-bag tomatoes exhaust their potting mix fastest, since every watering carries nutrients out the drainage holes, so weekly feeding matters most there. The potash-forward formula is built to carry a plant from vine-building into heavy fruit set.

It helps. Blossom end rot is a calcium shortage at the fruit, and Tomato Fertilizer carries unusually high calcium at 2.1% for that reason. But roots only move calcium in evenly moist soil, so irregular watering causes the problem even when calcium is plentiful; your tomato plant simply can’t deliver it to the fruit. Feed weekly, mulch to even out soil moisture, and water on a schedule. Fruit that sets after you fix both usually comes in clean. Tomatoes already affected don’t recover; the next set is where the difference shows.

Too much nitrogen relative to potash and phosphorus is the classic nutritional cause, and Tomato Fertilizer’s 3.6-3-5.1 ratio is built to avoid it: enough nitrogen to build the canopy early, then potash leading to set, fill and ripen fruit. Beyond nutrition, tomatoes drop blossoms in heat above roughly 90°F and won’t set well in shade, and an overfed plant in a rich bed will happily keep growing leaves. Give them the sunniest spot you have, keep watering even, and let the weekly feeding supply the rest.

Yes. Tomato Fertilizer is a mineral fertilizer derived from kelp and standard plant nutrient salts, made for edible gardens, and you can feed right up through harvest with no waiting period. The nutrients it supplies are the same ones your tomato plant would draw from the soil: nitrate nitrogen, phosphate, potash, calcium, magnesium and trace elements. Rinse tomatoes before eating as you normally would, especially if you’ve been leaf misting, since any residue on the fruit comes off with water.

Transplants green up and start moving within 1–2 weeks of weekly feeding, because all of the nitrogen in Tomato Fertilizer is nitrate, the form roots absorb directly. Fruit response shows over the next cluster: flowers that hold, then better-filled fruit as the potash does its work. Tomatoes already on your vine won’t resize much; the following set shows the difference, and a plant that started out starved keeps improving through the season as each new cluster forms under steady feeding.