A cannabis super soil ingredients list comes down to three groups: a base mix of one third peat moss or coco coir, one third compost or worm castings, and one third aeration such as perlite or pumice; mineral rock dusts and calcium sources; and organic meals such as kelp, alfalfa, neem, fish bone, and bat guano. Blend them, moisten the mix, and let it rest four to eight weeks before planting.
super soil for autoflowers recipe
What are the core super soil ingredients?
Most recipes divide inputs into base, minerals, plant food, and biology. The base holds roots and water. The minerals and meals feed the mix slowly, and the biology converts those inputs into forms roots can absorb.
cannabis super soil ingredients list
Base mix
- Sphagnum peat moss or coco coir
- High-quality compost, leaf mold, or earthworm castings
- Perlite, pumice, rice hulls, or lava rock for aeration
- A small charge of charged biochar (optional)
Mineral amendments
- Rock phosphate or colloidal phosphate
- Gypsum for calcium and sulfur
- Oyster shell flour or dolomite lime for calcium and pH buffering
- Glacial rock dust, azomite, or basalt dust for trace minerals
- Greensand or langbeinite for potassium and magnesium
Organic nutrient meals
- Kelp meal and alfalfa meal
- Neem meal or karanja meal
- Fish bone meal, bone meal, or crab shell meal
- Blood meal or feather meal for nitrogen
- Bat guano or seabird guano, used in small amounts
- Soybean meal or cottonseed meal
Biology and humic inputs
- Humic acid or fulvic acid powder
- Mycorrhizal inoculant
- Compost tea or bokashi, added at mixing or as a drench
What ratio do the ingredients follow?
A common working ratio is 1 part aeration, 1 part compost or castings, and 1 part peat or coco, which makes up the bulk of the batch. Amendments go in by volume at low rates, often one half cup to two cups per cubic foot split across minerals and meals. Strong inputs like blood meal, guano, and lime stay at the low end of that range.
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How long does super soil need to cook?
Four to eight weeks at room temperature lets microbes start breaking down the meals, which keeps raw fertilizer away from young roots. Keep the mix as damp as a wrung-out sponge and turn it every week or two. A faint earthy smell means it is ready, while a sour or ammonia smell means it needs more air and more turning.
Super Soil Recipe for Autoflowers
Which super soil ingredients are easy to overdose?
Blood meal, bat guano, and feather meal release nitrogen fast and can burn seedlings. Dolomite lime and oyster shell flour raise pH, so adding both at full rate can lock out nutrients. Planting young clones in a pocket of plain base mix protects them while roots reach the richer soil.
Is buying pre-mixed super soil more convenient than mixing your own?
For a two to four plant closet grow, a bag of organic living soil removes the measuring, the sourcing of six or more meals, and the four-week wait. Mixing from scratch pays off at scale, where a cubic yard batch costs less per plant and lets you tune the recipe. Convenience is the deciding factor for most home growers with limited space and time.
Do you need every ingredient on the list?
No. A working super soil can be built from base mix, compost, kelp meal, neem meal, rock phosphate, gypsum, oyster shell flour, and a humic product. The rest of the list adds balance and buffers, but roots still feed well without each item.