8 2 4MEDFINE50lb 600wide

Nutrient dense and well-balance granular, formulated for strong vegetative growth

Suståne® 8•2•4 granular

Great for specialty crop production in high-quality soils or potting mixes. Suståne 8-2-4 provides a safe, simple, and cost-effective feeding solution for cannabis. 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. 

Professional Grade 

Suståne Natural Fertlizer is backed by over 30 years of independent applied research on diverse crops and ecosystems. Unmatched by any other organic fertilizer manufacturer, such research is the foundation for developing products that deliver value under a wide variety of growing conditions. The superior performance of Suståne's products is recognized by growers from around the world.

Benefits of Suståne 8-2-4 All Natural, Slow-Release Nitrogen Fertilizer
  • Formulated to deliver a optimal mix of macronutrients 
  • Supplies a balanced mix of Ca, Mg, and all essential micronutrients needed to support plant growth
  • Adds cation exchange capacity, 6% humic acid, chelated micronutrients for improved nutrient use efficiency
  • Increases the 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
Safe for Plants, People and the Environment
  • Can be applied at higher N rates than other
    organic fertilizers
  • Manufactured by Suståne in the USA at an EPA-permitted composting site and OMRI-approved manufacturing process.
  • Fully tested and compliant the Food Safety Modernization Act requirements for fresh fruit and vegetable production
  • Approved for certified organic production and export to over 60 countries world wide.
  • Formulated for high nutrient use efficiency and reduced risk of nutrient run off
  • The most effective organic fertilizer available

For medical or recreational marijuana grow programs, see the Suståne Cannabis brochure. 

PROVEN Industrial Hemp Fertilization ProgramS 

  1. Broadcast and incorporate Suståne granules into soil prior to planting
  2. On fertile, well managed organic soils, use 1000 lb. of Suståne 8-2-4 per acre to produce solid yields
  3. Where soil P is low, use Suståne 3-7-4 to improve soil quality and deliver all essential nutrients
  4. Use Suståne Compost Tea (with or without Hi-N WDF) to improve drought stress tolerance and increase yields 
Example Hemp Fertility Programs

Crop Type





Pre-plant incorporation on day of seeding


​800-1600 lb. per acre


Pre-plant incorporation
immediately before
bed formation


1000 to 2000 lb. per acre

Supplementation during transplanting


1/8 to 1/4 cup per transplant

Fertigation during flowering

Compost Tea

100 gal per acre

Fertigation during flowering


2 lb. in 100 gal per acre


50 lb. covers 4000 ft2 @ 1 lb. N per 1000 ft2 (44 lb2 N per acre)
22.67 kg covers 372 m2 @ 0.5 kg N per 100 m2 (50 kg N per Ha)
12.5 lb. per 1000 ft2 / 6.25 kg per 100 m


Potting and Container Mix Soils

8-2-4 is recommended in all types of potting mixes. Incorporate up to the day of planting based on plant need, watering regime and pottin mix recipe.  Use 6 lb. (low rate) 10 lb. (medium rate), or 15 lb. per cubic yard (high rate). Incorporate and topdress during the vegetative stage of cannabis. See Suståne Cannabis brochure for details.

Garden Beds

Use in ground or raised bed gardens. Broadcast and incorporate 6 to 12 lb. per cubic yard of soil up to the date of planting. Side dress during the growing season, gently raking in granules to assure good soil contact.

Item # 
Suståne 8-2-4
Package Size Units / Pallets
(1.4 .mm - 0.6 mm) 
30-55-1375 (international)
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) 
30-55-1175 (international) 
50 lb. bags
1-ton tote 
22.7 kg bags 
40 bags / pallet
1 tote / pallet
44 bags / ISPM pallet
Bulk Density
4 6 4 Agriculture Bulk Density


Total Nitrogen (N)

     0.8% Ammoniacal Nitrogen
     0.8% Other Water Soluble Nitrogen
     6.4% Water Insoluble Nitrogen*
Available Phosphate (P(2O5) 2%
Soluble Potash (K2O) 4%
Calcium (Ca) 2%
Magnesium (Mg)
   0.01% Water soluble Magnesium (Mg)
Sulfur (S) 1%
Iron (Fe) 0.1%

Derived from aerobically composted turkey litter, feather meal, bone meal, and sulfate of potash. 
*6.4% slowly available nitrogen from aerobically composted turkey litter and feather meal

Information regarding the contents and levels of metals in this product is available on the internet at http://www.aapfco.org/metals.html