5 2 4FEMEDFINE50lb 600wide

Granulated professional turfgrass and landscape fertilizer.

Label Spec Sheet MSDS



Suståne 5-2-4+Fe is the original Suståne formula first created in 1988. As this was the first Suståne product available on the market, it soon became the standard organic evaluated by numerous universities. Michigan State University, Cornell, University of Rhode Island were three of the first research facilities to discover that Suståne 5-2-4+Fe was highly suppressive of common diseases affecting cool-season grasses including root Pythium, Necrotic Ring Spot, Red Thread and to a lesser extent various patch diseases. More organic fertilizer studies have been run utilizing Suståne 5-2-4+Fe as the standard against which all other “organics” are compared.

Recommended Use:

Suståne 5-2-4+Fe is the all-purpose turf food and is available in either Medium Grade (lawn and fairway applications) or Fine Grade for putting greens. Suitable for use on all turfgrass types providing quick green up followed by long-lasting slow-release organic nitrogen. Use where even growth and color are needed for six to eight weeks.

Benefits of Suståne 5-2-4+Fe

  • Provides quick green up followed by six to eight weeks of even color and growth
  • 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, 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.

Enhanced Disease Suppression:

  • Begins with Suståne Natural Based Fertilizers
  • Results of studies conducted over the past 20 years have clearly shown the potential for compost amendments to reduce the severity and incidence of a wide variety of turfgrass diseases.
  • For best results in disease, suppression apply either as a topdressing after core aerification, as a late autumn-winter cover, mixed as a root zone amendment or better yet use as the standard fertilizer treatment three to four applications per growing season. Studies have shown that applying Suståne 5-2-4 plus Iron results in a significant decrease in many turfgrass diseases.
  • The numbers below represent the percent decrease in the severity of turfgrass diseases.
AmendmentBrown PatchDollar SpotRed ThreadPythium Root Rot
Suståne 5-2-4+Fe 75.0 300.3 78.7 52.6
Fungicide Standard 88.9 97.0 --- 42.1
Sludge Compost 8.3 0.0 0.0 ---
Leaf Compost 38.9 4.5 0.0 ---
Horse Manure Compost 0 0.0 0.0 ---

Guaranteed Analysis

Total Nitrogen (N) 5%
1.1% Ammoniacal Nitrogen
0.1% Urea Nitrogen
0.3% Other Water Soluble Organic Nitrogen
3.5% Water Soluble Organic Nitrogen
Available Phosphate (P2O5) 2%
Soluble Potash (K2O) 4%
Calcium (Ca) 3%
Sulfur (S) 2%
Iron (Fe) 2%

Total Plant Nutrition

Humic Acid 5%
Organic Matter 50%
pH 6.8
Carbon:Nitrogen (C:N) 4:1
Bulk Density lb./cu. ft 39
% of Total N as Slow Release 70%

Derived from aerobically composted turkey litter, methylene urea, ammonium sulfate and sulfate of potash.
*3.5% slowly available nitrogen from aerobically composted turkey litter and methylene Urea.

Availble 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 2500 f2 @ 1 lb. N per 1000 ft2 (44 lb. N per acre)
  • 22.67 kg covers 100 m2 @ 0.5 kg N per 100 m2 (50 kg N per hectare)


  • Apply 20 lb. per 1000 ft2
  • Apply 100 g per 1 m2

Suståne Integrated Soil Management Program:

The following chart shows the recommended amounts of Suståne 5-2-4 +Iron for a typical integrated program.

Use & Application:Greens & TeesFairways, Athletic Fields, Parks and Lawncare
Rate (1b./1000ft2) Application Frequency Rate (lb./1000 ft2) Application Frequency
Early Feeding 10-20 1-2 10-20 1-2
Turf Establishment 15-25 2 10-20 1-2
Summer Stress/Disease Prevention 10-20 Monthly 10-20 Monthly
Core Aerification 10-15 1-2 10-15 2
Overseeding 10
At Overseeding
30 Days Following
60 Days Following
At Overseeding
30 Days Following
60 Days Following
Dormant Feeding 20 Prior to Dormancy 20 Prior to Dormancy
Snow Mold 20-30 1 Late Season
1 Early Spring
20-30 1 Late Season
1 Early Spring

Landscape Maintenance:

Professional landscapers have increasingly turned to Suståne 5-2-4+Fe 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 - 20 lb. per 1000 ft2
  • Summer - 15 lb. per 1000 ft2

Cool Season Turf

  • Athletic Fields, Parks and Lawncare
  • Apply 2-3 times per season
  • 15 lbs. per 1000 ft2

Soil Preparation For Flower & Shrub Beds

  • Light, Sandy Soil: 15 lb. per 100 ft2
  • Medium, Clay Loam Soil: 12 lb. per 100 ft2
  • Heavy, Silty, Clay Loam: 8 lb. per 100 ft2