Calcium Nitrate 15.5-0-0 Fertilizer Bulk Pricing (1 Pound)

Excellent CaNO3 (calcium nitrate) fertilizer. Very pure, with granules consistent in size. Not inexpensive, but probably the best form of nitrate you can buy, especially during the winter when ammonium toxicity is a concern.

I use this fertilizer on onion plants in tall raised beds every two weeks before they start to bulb. Then no fertilizer at all. This one keeps them making huge foliage and they stay dark green and growing great even after I stop the application and only water every day a little. Very good fertilizer and I have used it for several years. I will buy more.

Great product, great price.. Using in a Jacks 321 for DWC. This is the Part B of the Jacks 321..

Works great, but leaves greasy residue

This is one component of the Masterblend trio for hydroponic solution, and a useful fertilizer otherwise.These folks seem to be the main distributor for Masterblend and they've always been awesome on all counts. I've been using this in my hydro greenhouse for years and couldn't be happier.

A pinch by each plant brought forth great growth.

Pretreat the raised garden beds for veggies.Melts into soil quickly - your tomatoes will love it. 😊

This is a nice clean dissolving product. It loves to absorb water from the air, be sure to seal it up air tight immediately, and do not use thin plastic bags.I tried a different brand (yellow and red) from the local garden store, which along with being a local source was half of the price per pound. But it was coated in a thick layer of terrible smelling petroleum gloop. Probably to reduce water absorption in handling and storage, but I wouldn't want it in my soil and it would quickly cause problems in a hydroponic system.