Do I need Part B with Part A?

Yes. Part A supplies nitrogen and calcium; Part B supplies the phosphorus and potassium. Use them together at the rates on the label.

Is this for hydroponics or soil?

Both. It is labeled for hydroponic and soil use, so it works in reservoirs, coco, and potting mixes.

Yield depends on your feed strength, but at typical rates a 25 lb bag covers a large garden for a full cycle or more.

Granular nutrients can leave undissolved particles, especially in cold water. Mix thoroughly and check your reservoir before feeding.

At $115 at Cultivate as of November 6, 2026, the 25 lb bag is at the low end of its recent range across the four stores that list it new.

At Cultivate, for $115.00, 23% under what the other stores charge, as of our latest check.

Rated 3.6 out of 5 from 52 ratings.

7 stores we checked sell it, including eBay, Cultivate, Green Harvest Hydroponics, Front Row Agriculture, Greener Gardens.

$115.00at CultivateObserved at 9:54 PM

23% under what the other stores charge

Compared across 4 stores. Prices are checked against each store and labelled with when.