5 2 10FeFINE50lb 600wide

Granulated professional turfgrass and landscape fertilizer.

Label Spec Sheet MSDS


Suståne 5-2-10+Fe combines Suståne organic compost base with iron sulfate organically chelated during the active aerobic composting phase providing for slow-release iron for enhanced chlorophyll production and turf color without excessive top growth. This is the ideal 1:2 N to K organic-based fertilizer for summer and early autumn feeding.

Additional potassium is supplied for sandy soils and USGA type putting greens where potash is often lost through leaching.

Recommended Use:

Sustane 5-2-10+Fe is the all-purpose turf food when the 1:2 N to K ratio is desired for building carbohydrate reserves in the root system. It 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 and potassium reserves need to be increased.

Benefits of Suståne 5-2-10+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.

High Potassium to Nitrogen with Organic:

For use on sandy soils and fast-draining putting greens and high wear areas like driving ranges and tee boxes, Suståne 5-2-10+Fe is the first high-K organic product on the turf market. Many other organic fertilizer manufacturers have tried to emulate the Suståne formula over the years. None have produced a product comparable and so complete as Suståne 5-2-10+Fe. Naturally occurring sulfate of potash (potassium sulfate) from the Great Salt Lake in Utah is the only source of potash utilized in Suståne Natural Fertilizers that supplement the naturally occurring organic potash derived from the Suståne compost base.

The organically chelated iron source will not burn or blacken turfgrass. Rich in trace minerals and humic substances, Sustane 5-2-10+Fe is perfectly suited to amending low potash soils during periods of summer stress.

Guaranteed Analysis

Total Nitrogen (N) 5%
1.1% Ammoniacal Nitrogen
0.15% Urea Nitrogen
0.25% Other Water Soluble Organic Nitrogen
3.5% Water Soluble Organic Nitrogen
Available Phosphate (P2O5) 2%
Soluble Potash (K2O) 10%
Calcium (Ca) 3%
Sulfur (S) 6%
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.

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 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 5-2-10 + Iron for a typical integrated program.

Uses & Application:Greens & TeesFairways, Athletic Fields, Parks & Lawncare
Rate (lb./1,000 ft2) Application Frequency Rate (lb./1,000 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 5-2-10+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 ft2Label