Know Your Inputs.
Manage Your Yield.
Nutrients delivered exactly when your crops need them—with no deficiencies, no gaps, and no waste. Formulated for high plant-available nitrogen, our fertilizers have been proudly manufactured in Hanford since 1990. We are CDFA OIM listed and operate under a stringent HACCP program.
California Organic Fertilizers ships nationwide via LTL, truckload, and railcar.
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Authentic. Bonafide. Comprehensive.
In 1990, California Organic Fertilizers introduced California organic farmers to pelletized feather meal, meat and bone meal, and bone meal. More than three decades later, the details still matter.
A fertilizer pellet is not simply an ingredient pressed into a convenient shape. How that pellet is manufactured can influence whether the nutrients become available when the crop needs them.
Compression matters. Pellet diameter matters. Heat treatment matters.
Binder selection matters. Raw-material quality matters. And formulation matters.
No fillers. Ever.
Fertilizer labeling law requires a manufacturer to disclose the nutrients it's making a claim on — the guaranteed analysis. It does not require every ingredient in the bag to be listed. That gap leaves room for inert bulking material to be added to a product without ever appearing on the label.
Some manufacturers use lower-cost filler ingredients to reduce the cost of the finished product while still meeting the guaranteed analysis shown on the label. That may make the fertilizer less expensive, but it also means part of what the grower is buying contributes little or nothing to crop performance.
COFI takes a different approach. Every ingredient in a Phyta-Grow® or Phytamin® product is there because it contributes to the guaranteed analysis or the performance of the finished fertilizer — nothing is added simply to lower cost, add weight, or increase volume.
No Planned Variance. Ever.
Fertilizer law allows for guaranteed-analysis deficiencies within established official allowances or tolerances. COFI does not use this allowance in its formulations — in fact, we attempt to over-formulate, since natural raw materials can vary in nutrient values.
Predictable Pellet Degradation: Measurable Plant Availability.
A pellet that remains intact in the field after harvest did not deliver its nutrients when the crop needed them. Excessive compression, excessive processing, or poor pellet specifications can slow physical breakdown and nutrient release.
Formulation can create another problem. Using inexpensive ingredients with low Plant Available Nitrogen to reduce manufacturing cost may make the guaranteed analysis look acceptable while providing less usable nitrogen during the crop's critical growth period. COFI has used the same process since 1990 with the same consistent results.
Maximizing Soil Vitality with Microbially Facilitated Pellets
Organic fertilizers depend on biology. But not every field begins with the same level of biological activity. In soils with low biological activity, conventional preplant fertilizers may not mineralize rapidly enough to supply nutrients when crop demand begins.
COFI developed Phyta-Grow® Kickstart for those situations. Kickstart incorporates high-quality compost directly into the fertilizer pellet — introducing biological activity where it is needed most: in direct contact with the fertilizer ingredients that need to decompose.
Instead of waiting for the surrounding soil biology to find the pellet, the biological component is built into the product.
Fertilizer
Pre-plant dry material engineered for controlled nutrient release.
+ Biology
Compost blended directly into the pellet, in contact with the ingredients.
+ Moisture
Field moisture drives decomposition and nutrient release on schedule.
Phyta-Grow®
Phyta-Grow® pre-plant fertilizers build the fertility base a crop draws on through the season.
Phyta-Grow® products have a C:N ratio below 4:1. The higher the C:N ratio, the lower the amount of nitrogen available to the crop. "Microbes eat first" is a well-known statement meaning they have access to the nitrogen before the crop does. The amount of nitrogen consumed by microbes is directly related to the available carbon — so the higher the carbon, the less nitrogen for the crop.
Eliminate the Feast-or-Famine Nutrient Cycle
Ordered from fastest to slowest release, with the decomposition timeline behind each one — so you can match the product to how quickly your crop needs nitrogen.
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Phyta-Grow® Big Red
Derived from: Blood meal
Highly soluble nitrogen starts dissolving into soil moisture almost immediately, with visible plant response typically appearing within the first week. The bulk of the nitrogen is spent within the first month, and the remaining fraction is largely gone by around six weeks.
Phyta-Grow® Kickstart
Derived from: Soybean meal, compost
Compost blended directly into the pellet puts biological activity in contact with the soy meal from day one, accelerating breakdown beyond what field microbes alone would do. Most nitrogen releases through day 45, ahead of a standard soy meal product, with the remainder tapering through the season.
Phyta-Grow® Leafy Green Special Flagship
Derived from: Soybean meal
Microbes start breaking down soy protein almost immediately. Mineralization accelerates through day 21 as meaningful nitrogen becomes available. Most nitrogen releases through week 8, feeding active growth, with the remaining fraction tapering slowly through the rest of the season.
Phyta-Grow® Citrus Avocado Mix
Derived from: Meat & bone meal, blood meal, potassium sulfate
Blood meal and meat & bone meal both begin mineralizing quickly, delivering the bulk of available nitrogen within the first three weeks. Meat & bone meal's longer tail continues supplying nitrogen and phosphorus, with residual phosphorus mineralizing slowly afterward.
Phyta-Grow® Countdown
Derived from: Meat & bone meal, compost
Compost puts biology in direct contact with meat & bone meal from day one, accelerating breakdown beyond native field microbes — continuing mineralization for soils that would otherwise lag, with a residual fraction releasing slowly afterward.
Phyta-Grow® Veggie Mix
Derived from: Meat & bone meal
Roughly a third of the nitrogen mineralizes within the first five days. Release continues at a slower, steadier pace through mid-season, with remaining organic nitrogen and phosphorus continuing to mineralize slowly out to week 20.
Phyta-Grow® Salinas Veggie Mix
Derived from: Meat & bone meal, feather meal, potassium sulfate
Meat & bone meal mineralizes quickly while feather meal is still largely intact. As feather meal breakdown begins and enters its heaviest window, the blend extends nitrogen supply well beyond what either material would provide alone.
Phyta-Grow® Pre-Plant Plus
Derived from: Feather meal, meat & bone meal, potassium sulfate
Meat & bone meal mineralizes quickly while feather meal is still largely intact. As feather meal breakdown begins and enters its heaviest window, the blend extends nitrogen supply well beyond what either material would provide alone.
Phyta-Grow® Desert Special
Derived from: Feather meal, soybean meal
Soybean meal begins mineralizing and reaches its own peak release while feather meal is still largely intact. Feather meal then enters its heaviest breakdown window, extending nitrogen supply well into the season.
Phyta-Grow® Super N
Derived from: Feather meal
Soil microbes begin engaging the pellets in the first week, with little nitrogen released yet. Visible degradation follows by day 30. Peak breakdown occurs between days 30–90 as keratin proteins are heavily processed. By day 120+, the pellet is mostly incorporated into the soil, with residuals continuing to break down for up to 6 months.
Phyta-Grow® Bone Meal
Derived from: Fish bone meal
The finest particles begin mineralizing first, with most phosphorus still locked in bone structure. Root development benefits become noticeable within the first two months, and phosphorus continues releasing steadily through the core growing season — a single application can support a full season's phosphorus needs.
Phyta-Grow® Phosphate
Derived from: Rock phosphate
Only a small fraction of total phosphorus is immediately plant-available. Microbial and acid-driven solubilization gradually frees additional phosphorus over years, not months — a single application builds long-term soil phosphorus reserves rather than feeding one season.
Phyta-Grow® pre-plant builds the base. Phytamin® liquid fuels the growth.
Start strong. Finish stronger. Pair our heavy-duty pre-plant pellets with precision seasonal liquids to eliminate nutrient gaps and maintain optimum Plant Available Nitrogen (PAN) all season long.
Phytamin®: Natural Ammonia-Based
Natural ammoniacal nitrogen is immediately available for plant uptake and mineralized to nitrate within days. Phytamin® Pure and Phytamin® Jumpstart mix readily with many compatible liquid fertilizer materials, giving dealers and growers greater flexibility to create custom nutrient programs.
Phytamin® Pure Flagship
Der: MB
CDFA Registration: Registered OIM
Phytamin® Jumpstart Flagship
Derived from meat & bone meal, corn steep liquor and molasses
CDFA Registration: Registered OIM
Phytamin® Premier
Neutral pH formulation
CDFA Registration: Registered OIM
Phytamin® Humic Nitro
Ammonia + humic acid
CDFA Registration: Registered OIM
Phytamin® Powerhouse
Pure + soy protein hydrolysate
CDFA Registration: Registered OIM
Phytamin®: Fish-Based
Traditional liquid fish protein sources for growers building a fertility program around a fish-based input.
Phytamin® Pure Fish
Derived from: Fish protein concentrate
CDFA Registration: Registered OIM
Phytamin® Fish Concentrate
Derived from: Fish concentrate
CDFA Registration: Registered OIM
Phytamin® All Purpose
Derived from: Fish-based blend
CDFA Registration: Registered OIM
Phytamin®: Plant-Based
Plant-derived liquid inputs, including standalone corn steep liquor and soy hydrolysate formulations.
Phytamin® 700
Derived from: Soy hydrolysate
CDFA Registration: Registered OIM
Phytamin® Plant Extract
Derived from: Corn steep liquor
CDFA Registration: Registered OIM
Phytamin®: Mineral-Derived
A humic acid soil conditioner mined from leonardite/humate ore — not an ammonia, fish, or plant-based input.
Phytamin® Humic Acid
Derived from: Leonardite
Liquid soil-conditioning product
CDFA Registration: Registered OIM
How fast is each liquid actually available?
Different liquid nitrogen sources become plant-available on different timelines. The products currently featured here use natural ammoniacal nitrogen.
Ammoniacal nitrogen is already in a plant-available form on contact with the soil — no mineralization required.
Fish proteins and oils are already partially broken down through processing, with full availability typically within a few days.
Hydrolyzed plant proteins release nitrogen quickly, typically within a few days of application.
Phytamin® Humic Acid is a soil conditioner, not a nitrogen source, and isn't included in this comparison.
Phyta-QC
Crop and soil management minerals for targeted correction and biological support — used alongside the Phytamin® and Phyta-Grow® lines, not in place of them.
Phyta-Set QC
Derived from: Calcium Chloride and Sodium Tetraborate
Boron is essential to nitrogen utilization, and calcium is essential for the uptake of all other nutrients.
CDFA Registration: Registered OIM
Phyta-Cal QC
Derived from: Calcium Chloride
Calcium is essential for the uptake of all other nutrients.
CDFA Registration: Registered OIM
Phyta-Molasses QC™ Flagship
Derived from: Cane Molasses
Molasses is a highly soluble source of carbon, which is necessary for microbial activity (soil respiration).
CDFA Registration: Registered OIM
Phyta-Boost® Plant Food
A single, well-rounded formulation for lawns, landscapes, golf courses, and specialty horticulture.
Phyta-Boost™ Plant Food
Derived from: Soy meal
From the Organic Agronomist™
Have questions about which product fits your crop?
Talk with our team about a fertility program built around your soil, crop, and timing.
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