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Sustane 8-2-4 is a nutrient dense and well-balance granular formulated for strong vegetative growth.
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Suståne 8-2-4 is a natural organic slow-release fertilizer that provides a high amount of organic nitrogen for lasting plant nutrition.


Suståne 8-2-4 natural and organic fertilizer provides a balanced feed that promotes a rapid and vigorous vegetative establishment with 6 - 12 weeks of nitrogen in the organic slow-release form. Suståne replenishes the soil with a rich supply of humus (stabilized organic matter) and all of the primary, secondary and minor nutrients essential for quality growth. Suståne 8-2-4 provides a combination of dense plant nutrients and organic substances derived from biologically stable compost plus natural sulfate of potash and feather meal.

Suståne 8-2-4 provides a safe, simple, and cost-effective feeding solution for all types of crops. 8-2-4 provides balanced nutrition from seed through harvest. Suståne 8-2-4 is the perfect fertilizer for when you need significant quantities of organic slow-release nitrogen with low burn potential. Great for specialty crop production in high-quality soils or potting mixes.

Suståne 8-2-4 is a complete package fertilizer containing Slow Release Nitrogen, chelated micronutrients, organic phosphorous, and humic substances. Suståne 8-2-4 has been demonstrated time and again to surpass synthetic turf starter fertilizers and other sources of humates and plant biostimulants.

Recommended Use:

For use in the production of certified organic gardens, greenhouse bedding plants and annual establishment.

Benefits of Suståne 8-2-4

  • • Formulated to deliver an optimal mix of macronutrients 

    • Supplies a balanced mix of secondary and micronutrients 

    • Adds approximately 6% humic acid for enhanced cation exchange capacity and a source of carbon

    • Increases nutrient and water holding capacity of the soil

    • Enhances plant stress tolerance in any environment or soil type

    • Formulated with aerobic compost to support natural soilborne disease suppression 

    • Supports soil particle aggregation, increasing permeability, and nutrient cycling

    • Improves soil health

    • Can be applied at higher N rates than other
    organic fertilizers

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 blood or bone 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 the nutrient life cycle in poor soil.
  • Suståne is fully composted eliminating the need for sterilization, permitting a healthy environment for beneficial microbial populations.

Incorporating into Potting Soil Mixes and other Container Substrates:

Sustane 8-2-4 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
5.5 10 15 3.3 5.9 8.9

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 8-2-4:

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

Container Topdressing Application Rates in Grams:

Container Size
Rate5" Std.6" Std.1 gallon2 gallon3 gallon5 gallon7 gallon10 gallon15 gallon
Low 3 6 7 15 28 45 63 77 82
Med 7 13 19 39 67 108 140 186 200
High 10 18 28 59 104 165 237 285 306
  • 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.

Guaranteed Analysis

Total Nitrogen (N) 8%
0.4% Ammoniacal Nitrogen
0.4% Water Soluble Organic Nitrogen
7.2% Water Insoluble Organic Nitrogen*
Available Phosphate (P2O5) 2%
Soluble Potash (K2O) 4%
Calcium (Ca) 2.00%

Total Plant Nutrition

Iron 0.50%
Manganese 0.05%
Zinc 0.05%
Humic Acid 6%
Organic Matter 65%
pH 6.8
Carbon:Nitrogen (C:N) 4:1
Bulk Density lb./cu. ft 38
% of Total N as Slow Release 90%

Derived from aerobically composted turkey litter, feather meal, and sulfate of potash.
*7.2% slowly available nitrogen from aerobically composted turkey litter and feather meal

medfinegradeslockupAvailable 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 4000 ft2 @ 1 lb. N per 1000 ft2 (44 lb. N per acre)
  • 22.67 kg covers 372 m2 @ 0.5 kg N per 100 m2 (50 kg N per hectare)


  • Apply 12.5 lb. per 1000 ft2
  • Apply 63 g per 1 m2