Fine-grade 4-4-4 nutrition with added biology

Sigma 4-4-4 Bio Fine Grade combines balanced organic NPK with 6% calcium, 3% humic acids, and a biological package in a fine, micro-granular grade 110 fertilizer. The 50 lb bag is suited to precise application across turf, vegetables, trees, palms, ornamentals, and specialty crops.

• Balanced organic nutrition: 4-4-4 NPK plus 6% calcium and 0.1% iron.
• Value-added biologicals: beneficial bacteria, endomycorrhizae, and Trichoderma.
• Fine-grade granules: suited to application programs where even distribution matters.

Use it as part of spring or fall aeration recovery, midsummer stress management, dormant feeding, overseeding, or seasonal transition programs. For example, after aeration, the fine granules can be spread across turf as part of a measured nutrition program. Follow the product label and choose the rate for your crop and application method.

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, and Trichoderma).

Application rates

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

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

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 per 1 in. 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