Technology-Driven
Nutrition for
Organic Agriculture
Premium CDFA-listed fertilizers designed to improve nutrient efficiency, soil biology, and crop performance.
California Organic Fertilizers has manufactured organic fertilizers in Hanford, California since 1990. From the beginning, COFI has focused on highly efficient N-P-K fertilizers. We believe a balanced fertility program helps crops make better use of nutrients, supporting crop quality and yield while reducing unnecessary inputs. The goal is straightforward: healthier crops, more efficient production, and better returns for the farm.
NATURAL AMMONIA™ PLATFORM
A new class of non-synthetic nitrogen.
Our patented biological process (U.S. Patent No. 11,518,720) converts protein raw materials — the byproducts of food and agriculture — into 100% ammoniacal nitrogen. It is produced without manure and delivers nitrogen crops can use immediately, in a form soil microbes take up first.
NH₃ · Ammoniacal Nitrogen
Four product families.
Natural-ammonia liquids, dry protein-based fertilizers, targeted quality-control minerals, and a dedicated horticulture line.
Natural-ammonia liquids
100% ammoniacal nitrogen, immediately plant-available. Clean, low-sodium, and drip-compatible.
- Phytamin® Pure 5-0-0
- Phytamin® Jumpstart 4-1-1
Dry pre-plant fertilizers
We select the best organic materials for premium plant nutrition:
- Leafy Green Special 7-1-2: Crafted entirely from 100% plant-based materials.
- Dry Materials Lineup: Formulated using nutrient-dense meat meal, bone meal, feathermeal, and blood meal.
- Phyta-Grow® Super N 12-0-0
- Phyta-Grow® Leafy Green Special 7-1-2
- Phyta-Grow® Citrus Avocado Mix 8-5-4
- Phyta-Grow® Veggie Mix 8-5-0.5
Targeted minerals
Calcium, boron, and carbon products for correcting specific deficiencies or supporting soil biology alongside a base program.
- Phyta-Set QC 6% Ca · 1% B
- Phyta-Cal QC 8% Ca
- Phyta-Molasses QC 0-0-2
Horticulture nutrition
Phyta-Boost is used by professionals caring for golf courses, sports venues, parks, and public spaces. It promotes strong root development without encouraging a growth flush.
- Phyta-Boost Plant Food 7-1-2
Documented. Verified. Transparent.
Learn more about COFI transparencyCrop FINDERFind the right program for your crop.
Explore crop-specific organic fertility programs built around nutrient timing, crop demand, and practical field use.