4-6-4 ORGANIC provides complete nutrition, organic matter, beneficial microbiology in an easy to apply, long lasting homogeneous granule

Suståne® 4•6•4 granular


Suståne 4-6-4 is specifically formulated to be gentle on plants, making it a go-to fertilizer for spreading with seed and applying to seedlings. It restores quality growth for native prairie grasses and forbs for quick ground cover, minimizing soil erosion and the need for repairs or re-seeding. 

Suståne 4-6-4 works by replenishing the soil with a rich supply of humus (stabilized organic matter) and the essential nutrients required for sound and long term fertility programs. Suståne 4-6-4 provides a combination of slow release nutrients and organic substances that improve soil health. Derived from biologically stable compost plus natural potash and feathermeal. 

Professional Grade

Suståne Natural Fertilizer is backed by over 30 years of independent applied research on diverse crops and ecosystems. The superior performance of Suståne products is recognized by growers from around the world.

Benefits of Natural Organic 4•6•4

  • Adds approximately 5% humates by volume, increasing cation exchange
  • Adds carbon and organic matter to depleted soils
  • Increases nutrient and water holding capacity of the soil, strengthening plant tolerance to hot dry conditions
  • Promotes root development
  • Increases aggregration and porosity, for greater root development and water holding capacity
  • Suitable for arid and saline soils
  • Provides primary and secondary (macro and micro) nutrients necessary for plant growth

Safe for Plants, People and the Environment

  • Manufactured by Suståne in the USA at an EPA permitted facility
  • Pathogen and weed free
  • Contains no pharmaceutical waste
  • Allowed for export to over 60 countries world wide.
  • Derived from aerobically composted materials, so it won't attract insects or rodents to the application site
  • Contains compost-based microorganisms to help replenish life in poor soils

Land Management, Native Restoration & Erosion Control Programs** 

Final fertilizer recommendations should be based on laboratory soil tests and specific site conditions including but not limited to aspect and slope. Use higher rates for soils low in organic matter, high in salts or pH, and on steep and southern facing slopes. 

50 lb. covers 2000 ft2 @ 2 lb. N per 1000 ft2 (44 lb. N per acre) 
22.67 kg covers 186 m2 @ 0.5 kg N per 100 m2 (50 kg N per hectare) 
25 lb. per 1000 ft2 / 125 g per 1 m2 

Mix with water solution at a ratio of 2 lb. Suståne 4-6-4 to 1 gallon of water or 1 ton per 1,000 gallon tank 
For 44 lb. of N per acre apply 1100 lb. 
For 88 lb. of N per acre apply 2200 lb. 

Soil Preparation 

Light, High Sandy Soil: 6 lb. per 100 ft2 of bed (30 kg per 100m2

Medium, Clay Loam Soil: 4 lb. per 100 ft2 of bed (20 kg per 100m2) Heavy, Silty, Clay Loam: 2 lb. per 100 ft2 of bed (10 kg per 100m2

**NOTE: Adjust fertilizer program for local conditions & requirements. 


Store in a cool, dry place. Do not expose to moisture or extreme temperatures. For best results, use by expiration date printed on label. 

Item #
Suståne 4-6-4
Package Size Units / Pallets
(1.4 .mm - 0.6 mm)
50 lb. bags
1-ton tote 
22.7 kg bags 
40 bags / pallet
1 tote / pallet
44 bags / ISPM pallet 
(2.8 mm - 1.4 mm) 
30-20-1175 (international) 
50 lb. bags
1-ton tote 
22.7 kg bags 
40 bags / pallet
1 tote / pallet
44 bags / ISPM pallet

Guaranteed Analysis

Total Nitrogen (N)
  0.4% Ammoniacal Nitrogen
  0.4% Other Water Soluble Nitrogen
  3.2% Water Insoluble Nitrogen*
Available Phosphate (P(2O5) 6%
Soluble Potash (K2O) 4%
Calcium (Ca) 4%
Magnesium (Mg) 0.75%
Sulfur (S) 1%
Iron (Fe) 0.25%

Derived from aerobically composted turkey litter, feather meal, bone meal, and sulfate of potash. *3.2% slowly available nitrogen from aerobically composted turkey litter and feather meal.