What Is Actually in This 3-1-2 Organic Fertilizer
The three numbers on this bag describe the fertiliser half of the product. Total nitrogen is 3%, split 0.75% water soluble against 2.25% water insoluble, with 1% available phosphate and 2% soluble potash. That split matters more than the headline: three quarters of the nitrogen is slow release, so it feeds over weeks rather than in one flush. It is derived from hydrolyzed feather meal, meat meal, bone meal, poultry meal, blood meal, fish meal and langbeinite. The microbial half is where the propagule counts live. Mycorrhizal fungi total 467,046 propagules per gram, overwhelmingly ectomycorrhizal, led by Pisolithus tinctorius at 220,000 and Suillus granulatus at 145,000. Twelve bacteria ride alongside, from Bacillus licheniformis at 1.7 million CFU per gram down to Bacillus subtilis at 175,000. Two Trichoderma species and Saccharomyces cerevisiae yeast round it out.
Rates for a Granular Mycorrhizae Inoculant at Transplant
Granules want contact with root, which is the one rule that governs everything else. Sprinkle it into the planting hole, onto the rootball, or blend it through a potting mix before you fill. Scattering it on the surface of an established pot wastes most of it, since the spores never reach a root tip. Transplant rates run a quarter teaspoon from seed to a four inch pot, then a teaspoon at one gallon. Three gallon takes four teaspoons and five gallon takes two to four tablespoons. Woody stock takes more: four to six tablespoons at a one inch caliper stem and six to eight at two inches. For blending into media the rate is four to eight ounces per two and a half cubic feet of soil. Both certifications are real and worth the premium if you are selling into a certified channel. The honest limit is that a 1 lb tub does not go far at transplant rates. Anyone potting a room at five gallon will empty this in one session. The 25 lb version is a separate item for exactly that reason.
Key Features
- 3-1-2 analysis: Three percent nitrogen, one percent phosphate, two percent potash.
- Mostly slow release nitrogen: 2.25% of the 3% is water insoluble, so it feeds over weeks.
- 467,046 propagules per gram: Ecto and endo mycorrhizal fungi in one granule, counted on the label.
- Twelve beneficial bacteria: From 1.7 million CFU per gram down to 175,000, species by species.
- Trichoderma and yeast: Two Trichoderma species plus Saccharomyces cerevisiae in the blend.
- Meal-based nitrogen: Feather, meat, bone, poultry, blood and fish meals with langbeinite.
- OMRI Listed and OIM certified: Cleared for certified organic production in California and beyond.
- Transplant rates: A quarter teaspoon at seed up to eight tablespoons on woody stock.
Technical Specifications
| Specification | Value |
|---|---|
| SKU | 720305 |
| Brand | Plant Success Organics |
| Product | Granular, the dry mycorrhizal and fertiliser blend |
| Size | 1 lb, which is the 16 oz tub |
| NPK | 3-1-2 |
| Total nitrogen | 3%, as 0.75% water soluble and 2.25% water insoluble |
| Available phosphate | 1% |
| Soluble potash | 2% |
| Derived from | Hydrolyzed feather meal, meat meal, bone meal, poultry meal, blood meal, fish meal, langbeinite |
| Mycorrhizal total | 467,046 propagules per gram |
| Leading ecto species | Pisolithus tinctorius 220,000 and Suillus granulatus 145,000 per gram |
| Bacteria | Twelve species, 1,700,000 down to 175,000 CFU per gram |
| Fungi and yeast | Trichoderma koningii, Trichoderma harzianum, Saccharomyces cerevisiae |
| Transplant rate | 1/4 tsp at seed, 1 tsp at 1 gal, 4 tsp at 3 gal, 2-4 Tbsp at 5 gal |
| Potting mix rate | 4 to 8 oz per 2.5 cubic feet of soil |
| Certifications | OMRI Listed and OIM CDFA certificate |
| Other sizes made | 4 oz, 5 lb and 25 lb |
| Barcode | 689319013125 |