Premium Fine Grade Organic Nutrition + Value-Added Biologicals

Sigma 4-4-4 Bio Fine Grade is a micro-granular organic fertilizer with a size grade of 110 — engineered for precision application across turf, vegetables, trees, ornamentals, and specialty crop. Formulated with 100% organic, nutrient-rich ingredients and twice the biological concentration of standard dry formulas, it delivers balanced NPK alongside humic acids and a full biological package to strengthen root architecture and improve water and nutrient uptake.

Recommended for spring and fall aeration recovery, midsummer stress management, winter dormant feeding, cool-season overseeding nutrition, and warm-season transition programs.

Guaranteed Analysis

Total Nitrogen (N): 4.0%
— 0.2% Ammoniacal Nitrogen
— 0.6% Other Water Soluble Nitrogen
— 3.2% Water Insoluble Nitrogen
Available Phosphate (P₂O₅): 4.0%
Soluble Potash (K₂O): 4.0%
Calcium (Ca): 6.0%
Iron (Fe): 0.1%

Derived from: processed poultry manure, feather meal, bone meal, and sulfate of potash.

Biological Package

• Humic Acids: 3.0%
• Beneficial Bacteria: 2,800,000 CFU/lb
• Endomycorrhizae: 6.1 Propagules/lb
• Trichoderma: 480,000 CFU/lb

Also available without the BIO Package (beneficial bacteria, endomycorrhizae, trichoderma).

Application Rates

Turf
Medium: 19 lb (0.75 lb N) / 1,000 sq ft
High: 25 lb (1.0 lb N) / 1,000 sq ft

Golf Course
Low: 12.5 lb (0.50 lb N) / 1,000 sq ft
Medium: 19 lb (0.75 lb N) / 1,000 sq ft
High: 25 lb (1.0 lb N) / 1,000 sq ft

Vegetables
Low (peas, beans): 1,000 lb/acre — incorporate 2–3 weeks before planting
Medium (asparagus, beet, carrot, melon, pepper, cauliflower, broccoli, celery): 2,500 lb/acre
High (onion, sweet corn, potato, tomato): 2,500 lb/acre at planting, then broadcast or band after establishment

Trees & Palms — Rate based on 1" of trunk diameter (caliper).
Incorporation: 6.0 lb at transplanting
Broadcast: 12.0 lb at transplanting

Ornamentals

• Low (porosity <60%): 30 lb/cu yd incorporation | 49 lb/1,000 sq ft landscape
• Medium (most nursery stock): 45 lb/cu yd incorporation | 86 lb/1,000 sq ft landscape
• High (porosity >80%): 56 lb/cu yd incorporation | 124 lb/1,000 sq ft landscape

Container Rates

• 1 gal: 56–112 g
• 2 gal: 112–225 g
• 3 gal: 169–356 g
• 5 gal: 225–488 g
• 7 gal: 338–731 g
• 10 gal: 413–881 g
• 15 gal: 450–938 g

Documents

• Safety Data Sheet (SDS)
• Product Label
• Product Flier