Sustane4 6 4 50lbCommercialMEDFineGrade1200PXLS

Suståne® 4-6-4 All Natural Granulated Slow Release Nitrogen Fertilizer

Organic Plant Starter and Soil Builder

OMRI CDFA seal 6cm 4col WashingtonOrganic biobased
Label Spec Sheet MSDS OMRI Certificate WSDA Certificate





All-purpose slow release fertilizer for landscaped areas, overseeding and turf establishment. Fastest starter available. Golf course, home, and sports turf grow in. Allowed for use in the production of certified organic crops, rapid vegetative establishment, landscaped areas, overseeding and turf establishment, erosion control, native prairie reestablishment. Fastest starter available.


Recommended Use:

Suståne 4-6-4 is a natural organic starter and maintenance fertilizer. 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. Suståne replenishes the soil with a rich supply of humus (stabilized organic matter) and all of the essential nutrients required for quality growth. Derived from biologically stable compost plus natural potash and feathermeal. 4-6-4 All Natural Fertilizer promotes a rapid rate of vegetative establishment. Quick ground cover minimizes soil erosion and the need for repairs or re-seeding. 

Benefits of Suståne 4-6-4

  • Increases the nutrient and water holding capacity of the soil
  • Strengthens plants tolerance against hot dry conditions
  • Promotes greater root development
  • Improves buffering against changes in soil pH
  • Increases the soil’s ability to suppress plant pathogens
  • Increases soil porosity and stability for greater root development and water holding capacity

Always Safe for Plants, People, Pollinators, and the Environment

  • Manufactured by Suståne in the USA at an EPA permitted facility.
  • Pathogen and weed free, no sewage sludge, blood or meat products. Allowed for export to over 60 countries worldwide.
  • Aerobic composting eliminates animal and rodent attraction to the application site.
  • Contains naturally occurring beneficial bacteria and fungi that are necessary to begin nutrient life cycle in poor soil.
  • Suståne is fully composted eliminating the need for sterilization, permitting a healthy environment for beneficial microbial populations.

Guaranteed Analysis

Nitrogen 4%
Available Phosphate (P2O5) 6%
Soluble Potash (K2O) 4%
Calcium (Ca) 4%
Magnesium (Mg) 1%
Sulfur (S) 1%
Iron (Fe) 0.25%

Total Plant Nutrition

Manganese 0.05%
Zinc 0.05%
Humic Acid 7%
Organic Matter 50%
pH 6.8
Carbon:Nitrogen (C:N) 4:1
Bulk Density lb./cu. ft 36
Salt Index (scale 1-100) 4
% of Total N as Slow Release 80%

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

Available Particle Sizes:

  • Medium Grade, 200 SGN (2.8 mm - 1.4 mm)
  • Fine Grade, 100 SGN (1.4 mm - 0.6 mm)


  • 50 lb. covers 2000 ft2 @ 1 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)


  • Apply 12.5 lb. per 1000 ft2
  • Apply 125 g per 1 m2


Suståne Integrated Soil Management Program: Turf Establishment, Seeding, New Lawn Construction Laying Sod and Sprigging: Suståne 4-6-4 is a complete package fertilizer containing Slow Release Nitrogen, chelated micronutrients, organic phosphorous and humic substances. Suståne 4-6-4 has been demonstrated time and again to surpass synthetic turf starter fertilizers and other sources of humates and plant biostimulants.

Preplant - Broadcast and Incorporate into top 4 in. (5 cm) of soil

  • 50 lb. per 1,000 ft2 or 2,200 lb. per acre
  • 25 kg per 100 m2 or 1,250 kg per hectare

Postplant (45-60 days) - Broadcast and water in

  • 25 lb. per 1,000 ft2 or 1,100 lb. per acre
  • 12.5 kg per 100 m2 or 1,250 kg per hectare

Landscapers' Choice: Professional landscapers have increasingly turned to Suståne 4-6-4 for use on high maintenance turf and landscaped environments. While synthetic fertilizers supply plant growth nutrients, they do not supply the organic matter required to maintain quality growth. Using fully composted natural fertilizers increases the levels of beneficial microbial activity, which in turn convert nutrients into plant available forms.

Warm Season Turf

  • Athletic Fields, Parks and Lawncare
  • Apply 4-7 times per season
  • Spring and Fall - 25 lb. per 1,000 ft2
  • Summer - 19 lb. per 1,000 ft2

Cool Season Turf

  • Athletic Fields, Parks and Lawncare
  • Apply 2-3 times per season
  • 25 lbs. per 1,000 ft2

Soil Preparation For Flower & Shrub Beds

  • Light, Sandy Soil: 20 lb. per 100 ft2
  • Medium, Clay Loam Soil: 15 lb. ft2
  • Heavy, Silty, Clay Loam: 10 lb. per 100 ft2

Land Management, Native Restoration & Erosion Control Programs:


  • For 44 lb. of N per acre apply 1100 lb.
  • For 90 lb. of N per acre apply 2200 lb.
  • For 130 lb. of N per acre apply 3400 lb.

Soil Preparation

  • Light, High Sandy Soil: 20 lb. per 100 square feet of bed
  • Medium, Clay Loam Soil: 15 lb. per 100 square feet of bed
  • Heavy, Silty, Clay Loam: 10 lb. per 100 square feet of bed

(Hydroseeding: Mix with water solution at a ratio of 4 lb. Suståne 4-6-4 to 1 gallon of water or 2 tons per 1,000 gallon tank). Crop Application Rates for Suståne 4-6-4:

CropTimingApplication Methodcups/100ft2lb./1,000ft2lb./acre
Apples/fruit trees annual broadcast 1 lb. per 1" tree dia. 1 lb. per 1" tree dia. 1 lb. per 1" tree dia.
Brassicas* at transplant & 4 leaf stage broadcast 2.8 9.2 400
  2 wk. pre-crown set sidedress 5.2 17.2 750
Carrots at planting & 4wks pre-harvest sidedress 1.4 4.6 200
Curcubits (all vine crops) post plant in row 8.2 22.6 1,200
Garlic apply 3x per season sidedress 1.5 5.2 225
Grasses/Forages preplant broadcast 7.6 25.3 1,100
  post emerge broadcast 17.2 57.4 2,500
Legumes preplant broadcast 6 20.2 880
Lettuce-high density (12-18") at transplant & after 2 wks sidedress 15.5 51.7 2,250
Lettuce-low density (30") at transplant & after 2 wks sidedress 7.8 25.8 1,125
Onions at transplant & at 10" ht sidedress 1.9 6.4 280
Peppers at transplant & pre-blossom sidedress 2.4 8 350
Potatoes at seeding direct on row 11.3 37.9 1,650
Raspberries, year 1 at transplant banded on row 5.5 18.4 800
Raspberries, year 2 spring application broadcast over row 2 6.9 300
Small Grains at seeding direct with seed 0.6 2.0 88
Strawberries, year 1 at transplant & pre-runner in row 3.4 11.5 500
Strawberries, year 2 at dormancy break broadcast over row 2.9 6.9 300
Sweet Corn, early starter sidedress 5.5 18.4 800
  at layby sidedress 2.8 9.2 400
Sweet Corn, mid-season at planting sidedress 5.5 18.4 800
Squash, hollow stem pre or post plant broadcast 6.9 23.0 1,000
Tomatoes at transplant sidedress 3-4" away 17.2 57.4 2,500

Includes broccoli, cauliflower, cabbage, kale, Chinese cabbage, bok choy, and mustard greens. Incorporating into Potting Soil Mixes and other Container Substrates: Suståne 4-6-4 provides a constant release of nutrients when used with container substrates with an average temperature of 70oF / 21oC. When determining application rates consider all cultural practices including irrigation, container substrate physical characteristics and growing environment. Container Mix Application Rates:

Container Mix Rates by Volume
lb. per cubic yardkg per cubic meter
Low Med High Low Med High
11 20 30 6.5 11.8 17.8

Low Rate: Recommended for use on salt sensitive species; when concurrent with liquid feed; with production systems utilizing low leaching fractions (less than 10%); and when applied to heavy potting substrates (total porosity less than 65%). 
Medium Rate: Recommended for use on medium feeding species; on most nursery stock and foliage plants; and when liquid feed is not performed concurrently. 
High Rate: Recommended for use on heavy feeding species; with production systems utilizing high leaching fractions (greater than 20%); and when applied to light, porous substrates (total porosity greater than 80%). Bulk Density of Suståne 4-6-4:

Rounded Measure (Volume)Grams (weight)
Teaspoon (tsp) Tablespoon (Tbsp.) 1 oz. 1/4 cup 1/2 cup 1 cup
2.8 g 8.5 g 17 g 34 g 68 g 136 g

Container Topdressing Application Rates in Grams:

Container Size
Rate5" Std.6" Std.1 gallon2 gallon3 gallon5 gallon7 gallon10 gallon15 gallon
Low 6 12 14 30 56 90 126 154 164
Med 14 26 38 78 134 216 280 372 400
High 20 38 56 118 208 330 474 570 612
  • These rates are intended as guidelines. Suståne encourages a trial prior to changing any fertilizer program.
  • Do not steam sterilize container mix after fertilizer has been incorporated.
  • Do not store container mix more than two weeks after incorporating fertilizer. Plant material can be damaged by salt accumulation.
  • Monitor electrical conductivity (EC) of container substrate throughout the production cycle.
  • If the mix is stored longer than two weeks, leaching container mix may be required to remove accumulated salts.
  • Adjust application rate as needed.