Two-part blend with four-way release of nitrogen 90-120-day nutrient release at 70°f (21°c)

Suståne 18-1-8+Fe

The controlled release portion of the material is made from industry leading polymer coated sulfur coated urea.  Nutrient release rates from Suståne 18-1-8+Fe are based on soil or substrate temperature and microbial activity and prevents dumping of nutrients.

Professional Grade 

Suståne products are derived from biologically stable humus-rich compost and contain both water soluble nitrogen (WSN) and slow release nitrogen (SRN), beneficial microbiology, and all 17 elements essential for plant photosynthesis. Suståne products increase soil cation exchange capacity (CEC) by supplying humates and stable organic matter. Suståne’s organic and blended natural fertilizers provide all soil types with additional buffering capacity, allowing for more consistent and productive growth.

Benefits of Suståne 18-1-8+Fe CRF
  • Combines 4 different forms of nitrogen: 3 types of slow release including Suståne Organic N, PCSCU, methylene urea and 1 form of quick release nitrogen from ammonium sulfate
  • 15.3% (85% of total N) is slow release nitrogen
  • 18-1-8+Fe is extremely safe and will not burn or discolor turfgrass 
  • Uniform particle size allows for even application
  • Long lasting Suståne 18-1-8+Fe provides steady, slow growth with excellent color for up to four months

Cool Season Grasses

Golf course tees fairways collars, sportsfields, and lawncare 

Standard maintenance rates, Spring, Summer, Fall: 

5.5 lb. to 10 lb.per 1000 ft2 (2.5 kg to 4.5 kg per 100 m2) depending on N requirement 

Warm Season Grasses

Golf course fairways, roughs, sportsfields, parks, and lawncare

Standard maintenance rates:
2.75 lb. to 5.5 lb. per 1000 ft2 for .5 lb.-1 lb. N/1000 ft2 (1.4 kg to 2.8 kg per 100 m2) per application at frequency determined by clipping yields.


Store in a cool, dry place. Do not expose to moisture or extreme temperatures. 

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

Item # 
Suståne 18-1-8
Package Size Units / Pallets
(2.8 mm - 1.4 mm) 
40-90-1175 (international)
50 lb. bags
1-ton tote 
22.68 kg bags 
40 bags / pallet
1 tote / pallet
44 bags / ISPM pallet 

Bulk Density

bulkdensity18 1 8