Growth Products 18-3-6
Classic Fertilizer

Growth Products Classic 18-3-6
Growth Products Classic 18-3-6 Fertilizer - $63.95 - 2.5 Gallon Container
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Growth Products Classic 18-3-6 Case- $119.95 - Two 2.5 Gallon Containers
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Save Money By the Case
Two 2.5 Gallon in Case
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Product Information

Growth Products 18-3-6 Classic Fertilizer with 50% Slow Release Nitrogen is one of the industries best liquid fertilizers and made with the highest standards and finest ingredients. For home lawns, it is one of the absolute best.

It is routinely used in the sports industry on gulf courses, including greens, tees, fairways and professional sports fields and is used by the better professional turf companies. We are now offering it to our customers as well. If you are looking for the finest liquid fertilizers, then this is it.

For Sports Turf, Lawns, Trees and Shrubs

The Classic 18-3-6 with 50% slow release Nitrogen plus micronutrients is a concentrate that can be used on any type of turf as well as soil injected around trees and shrubs. It can be sprayed with a hand sprayer or backpack sprayer up to large multi-gallon sprayers and high pressure sprayers. 

Growth Products 18-3-6 Classic Fertilizer Contains:

  • 18% nitrogen (N) by weight and includes 50% slow release water soluble nitrogen
  • 3% phosphorus (P) for strong root development and 
  • 6% potassium (K) for stess relief and stronger plants
  • .1% iron
  • .05% copper
  • .05% manganese, and 
  • .05% zinc

** For those developing their own fertility plan

1 Gallon of Classic 18-3-6 weights 10.58 lbs and contains 1.9 lbs Nitrogen

For home lawns, 18-3-6 classic is safe to use on newly seeded lawns and established lawns of Bentgrass, Ryegrass, Fescues, Bluegrass, and warm season grasses, including Bermudagrass, Zoysia, St. Augustine, and others.

It can also be mixed with Herbicides, Fungicides, and Insecticides. 

Growth Products 18-3-6 Classic Fertilizer quick reference for homeowners

Basic Mixing Rates are listed on the bottle, but here is a quick fertility reference for homeowners. 

*** All references are ounces of product per gallon of water per 1000 sq ft.

Home Lawns ............ 10 - 20 oz per gallon water.............. Lasts 6 - 8 Weeks


Cool Season Grasses for Home Lawns

Spring Application Cool Season Grass - 10 - 12 oz per gallon water 

Late Spring Application  after spring surge growth ends - 12 - 15 oz per gallon water

Late Summer Application when temps are in 80's-  20 oz per gallon water

Fall Application - 20 - 34 oz per gallon water when high temps are in 70's or lower

** High maintenance sports turf may require more applications at different rates.


Warm Season Grasses

Nitrogen rates vary and depend on the nitrogen requirements of your grass type

Low nitrogen Grasses, such as Zoysia 6 - 8 ounces per gallon per application

High nitrogen grasses, such as bermudagrass 20 - 25 ounces per gallon per application


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