Grow More® Water Soluble Fertilizer 10-52-10 — 25 lb Bag

No-Carrier Phosphate Powder Built for Transplant Support and Deficiency Correction

A fertilizer that leaves clay carrier residue behind is a liability in drip lines and precision equipment, and a deficient root system doesn't have time to wait for a slow correction. Grow More Water Soluble Fertilizer 10-52-10 solves both problems with an extreme phosphate concentration — 52% P2O5 — balanced by equal nitrogen and potassium, formulated without clay carriers or insoluble fillers so it dissolves completely and leaves no residue.

The 25 lb bag is the commercial-volume format of this professional-grade phosphate standard, suited to root development during transplanting and propagation, and to correcting phosphate deficiency wherever it shows up.

Key Features & Benefits

• 52% Available Phosphate: Extreme phosphate concentration drives rapid correction in deficient plants and powers root cell division and early establishment.
• No Clay Carrier: Formulated without insoluble carriers, dissolving completely with no residue to protect irrigation equipment and keep measurements accurate.
• Root Development and Transplant Support: The high-phosphate profile suits young plants, transplants, and rooted cuttings during establishment, when a strong root system matters most.
• Phosphate Deficiency Correction: Rapidly addresses symptoms like purple or reddish leaf discoloration and slow growth with a concentrated phosphate boost.
• 25 lb Commercial Format: Supplies high-volume, bulk phosphate nutrition for commercial growing and large greenhouse operations.

Who Should Use This

Commercial greenhouse operators, large-scale indoor cultivators, and nursery propagators who need a high-purity, high-volume phosphate source for rooting, transplant support, or deficiency correction are the direct fit. The 25 lb format is most practical for operations with steady, high-throughput use.

About Grow More Inc.

Grow More Inc. has manufactured fertilizers since 1918, beginning as National Chemical Company in Hollywood, California and now operating from Gardena, California, with this no-carrier 10-52-10 forming part of its standard professional water-soluble line.

Frequently Asked Questions

What are the signs of phosphate deficiency in plants?

Phosphate deficiency commonly shows up as purple, reddish, or bronze discoloration on leaf undersides, stems, and petioles, along with slow overall growth and delayed maturation. These symptoms are most common in cold soil conditions where phosphate uptake drops even when solution P levels are adequate.

Can I use this formula throughout the entire crop cycle?

It's optimized for establishment, early growth, and deficiency correction rather than season-long use, since running it as the sole nutrient would supply excess phosphate relative to nitrogen and potassium for most stages. Transition to a more balanced formula once plants are established.

Is this product safe for drip irrigation systems?

Yes, the no-carrier formulation dissolves completely, making it fully compatible with drip emitters and recirculating hydroponic systems without the sediment risk that carrier-based fertilizers carry. That makes it a practical choice for precision fertigation equipment where clogging is a persistent maintenance concern.

How is this different from a specialty Mendocino starter formula with the same ratio?

Both share the 10-52-10 NPK ratio, but this is part of Grow More's standard professional water-soluble line, formulated specifically without clay carriers for complete solubility. Both are high-purity, high-phosphate formulas suited to rooting and deficiency correction.