Sigma SI
With Value-Added Biologicals
Energize your soil with Sigma Si, a natural source of plant available silicon that improves soil and strengthens crops, and can result in higher yields and increased profits. Containing ingredients to strength disease immunity like humic accid and organic carbon minerals, our fertilizer is proven and tested to enhance your plant's life.
Available Packaging:
2000 LB. TOTES (907 KG), 50 LB. POLYETHYLENE BAGS (22.68 KG), OR BULK LOAD
Guaranteed Analysis
| Silicon Dioxide (SiO2) | 72.0% |
| Inert Material | 23.0% |
| Organic Binder | 5.0% |
Derived from Volcanic Tuff Mined Minerals Unprocessed.
Application Rates
Turf
Natural:
Medium: 4 lb. / 1000 sq ft. (0.75 lb. N)
Lawns:
High: 6 lb. / 1000 sq ft.(1.0 lb. N)
Golf Course
Low Rate:
2 lb. / 1000 sq ft.(0.50 lb. N)
Medium Rate:
4 lb. / 1000 sq ft. (0.75 lb. N)
High Rate:
6 lb. / 1000 sq ft. (1.0 lb. N)
Vegetable
Low Rate:
(Examples – peas, beans) Incorporate 75 lb. per acre 2-3 weeks prior to planting.
Medium Rate:
(Examples – asparagus, beet, carrot, melon, pepper, cauliflower, broccoli, brussels sprout, and celery) Incorporate 125 lb. per acre 2-3 weeks prior to planting.
High Rate:
(Examples – onion, sweet corn, potato, tomato) Incorporate 200 lb. per acre 2-3 weeks prior to planting.
Tree & Palm
Rate based on 1” of trunk diameter (caliper). Example: for 10” trunk diameter (caliper) multiply label rate by 10.
Incorporation:
Mix with soil in bottom of holes prior to transplanting. Apply 3.0 lb. at Transplanting.
Broadcast:
Apply 6.0 lb. at Transplanting.
Ornamentals
Low Rate:
(for heavy substrates with porosity < 60%)
Incorporation:
15 lb. per cubic yard of media
Landscape:
195 lb. per 1000 sq. ft.
Medium Rate:
(for most nursery stock and foliage plants)
Incorporation:
20 lb. per cubic yard of media
Landscape:
35 lb. per 1000 sq. ft.
High Rate:
(for light substrates with porosity > 80%)
Incorporation:
30 lb. per cubic yard of media
Landscape:
50 lb. per 1000 sq. ft.
Container Sizes
| 1 Gallon: | |
| Low Rate: 21 grams | High Rate: 42 grams |
| 2 Gallon: | |
| Low Rate: 42 grams | High Rate: 84 grams |
| 3 Gallon: | |
| Low Rate: 56 grams | High Rate: 112 grams |
| 5 Gallon: | |
| Low Rate: 98 grams | High Rate: 196 grams |
| 7 Gallon: | |
| Low Rate: 126 grams | High Rate: 252 grams |
| 10 Gallon: | |
| Low Rate: 196 grams | High Rate: 392 grams |
| 15 Gallon: | |
| Low Rate: 294 grams | High Rate: 588 grams |