Lawn & Tree Care

PolyPhosphite 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 30® (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 30® (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 30® (0-0-27) economically feeds and protects the plant through superior Phosphorous Acid nutrition. PolyPhosphite 30® (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:

Greens, Tees and Fine Turf: Apply 2.0 - 6.0 oz. of PolyPhosphite 30®(0-0-27) with 1.5 - 2 gallons of water per 1,000 sq. ft. (0.7 - 2.0 gallons of PolyPhosphite 30® (0-0-27) with 66 - 88 gallons of water per Acre) every 10 to 21 days throughout the growing season. This application shall provide 0.05 - 0.18 lb. of actual Potassium per 1,000 sq. ft.

Fairways, Roughs, Sports Turf and Lawn Care: Apply 1.0 - 1.5 gallons per Acre of PolyPhosphite 30® (0-0-27) with 44 - 88 gallons of water per acre (3.0 - 4.4 oz. of PolyPhosphite 30® (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 30® (0-0-27) may be injected through fertigation systems. The systemic action of PolyPhosphite 30® (0-0-27) allows foliar and root uptake within the turf plant. Inject the equivalent of 1 - 1.2 gallons of PolyPhosphite 30® (0-0-27) per acre. Use the lower rate for weekly injections. Use a higher injection rate when applying every 10 to 14 days or during higher stress conditions. 

Tree & Shrubs: Broadcast Soil Method: Mix PolyPhosphite 30® (0-0-27) at 2 quarts per 100 gallons of water and apply as a soil drench or soil injection at the rate of 25 gallons per 1000 sq. ft. of root zone.

Basal Drench/ Injection: Mix PolyPhosphite 30® (0-0-27) at the rate of 2 gallons per 100 gallons of water. Drench the soil near the stem of the shrub or tree at the rate of 1 quart per inch of stem diameter at 4.5 feet (DBH) or 1 quart per foot of height for shrubs. A soil wetting agent can be added to the mixture to improve soil penetration.

Foliar Spray: Mix PolyPhosphite 30® at the rate of 2 quarts per 100 gallons and apply a spray to wet the foliage. The addition of a sticker spreader at labeled rates is recommended.

Application Rates for PolyPhosphite 30® (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  PolyPhosphite 30® (0-0-27), apply with at least 2 gallons of water. For every 2.5 oz of PolyPhosphite 30® (0-0-27), apply with at least 1 gallon of water.