Lawn & Tree Care

Phosphite 30, 0-0-27

PolyPhosphite 30
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*** Commercial and Professional Use Only. Plant Food Company, Inc. offers its products and services to commercial entities and certified professionals through Business-to-Business transactions only. No products are offered to non-commercial entities or through retail sales. ***

The Only True Potassium PolyPhosphite

PolyPhosphite 30TM (0-0-27) is a pure Potassium PolyPhosphite fertilizer solution that is manufactured in a one step process by reacting Phosphorous Acid and Potassium Hydroxide in a patented high temperature, rapid cooling process that preserves the maximum amount of Phosphorous in the desirable H3PO3 (Phosphorous Acid) form. This unique PolyPhosphite 30TM (0-0-27) manufacturing process neither contains nor requires any H3PO3 preserving or solubility additives that are necessary in competitive products. As a result, PolyPhosphite 30TM (0-0-27) economically feeds and protects the plant through superior Phosphorous Acid nutrition. PolyPhosphite 30TM (0-0-27) is rapidly absorbed by turfgrass blades for maximum nutritional benefit in order to prevent and correct nutrient deficiencies and to promote disease resistance. Note: With foliar applications, phosphite ions are taken up directly by the plant foliage and may undergo a degree of conversion to phosphate ions, or be utilized directly by the plant as phosphite ions.

Directions For Use:

Lawn Care: Apply 1.0 - 1.5 gallons per Acre of PolyPhosphite 30TM (0-0-27) with 44 - 88 gallons of water per acre (3.0 - 4.4 oz. of PolyPhosphite 30TM (0-0-27) with 1 - 2 gallons of water per 1,000 sq. ft.) every 14 days throughout the growing season. This application shall provide 0.08 - 0.11 lb. of actual Potassium per 1,000 sq. ft.

Fertigation: PolyPhosphite 30TM (0-0-27) may be injected through fertigation systems. The systemic action of PolyPhosphite 30TM (0-0-27) allows foliar and root uptake within the turf plant. Inject the equivalent of 1 - 1.2 gallons of PolyPhosphite 30TM (0-0-27) per acre. Use the lower rate for weekly injections. Use higher injection rate when applying every 10 to 14 days or during higher stress conditions. 


Application Rates for PolyPhosphite 30TM (0-0-27)

Fluid Oz/ 1,000 sq. ft. 

Gallons/ One Acre

ML/ 1,000 sq. ft. 

L/HA Litre/ Hectare 

Potassium/ 1,000 sq. ft. 

Phosphite/ 1,000 sq. ft. 

2.0 0.7 59 6 0.06 0.05
3.0 1.0 89 10 0.09 0.08
4.0 1.4 118 13 0.12 0.11
4.4 1.5 130 14 0.13 0.12
6.0 2.0 177 19 0.18 0.16


Important Details: 

Do not apply to emerging seeds, especially if soil pH is less than 6.0. Do not mix with fixed copper or copper based fungicides if the pH of the spray solution is below 6.0. Use sufficient water to ensure thorough coverage. Do not exceed a maximum product spray concentration of 2%. For every 5 oz. of  Phosphite 30 (0-0-27), apply with at least 2 gallons of water. For every 2.5 oz of Phosphite 30 (0-0-27), apply with at least 1 gallon of water.