BuildASoil
BuildASoil Commercial Pro Blend - Nutrient Pack
BuildASoil Commercial Pro Blend - Nutrient Pack
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Commercial Top-Dress Amendment
Feed the soil, keep production consistent all cycle.
Pro Blend is our commercial top-dress built for growers who can't afford surprises. Clean inputs, low heavy metals, and a steady now-and-later nutrient curve that holds your soil in range without a soil test or a complicated feed program.
Feed the soil.
Pro Blend is our commercial top-dress product. It loads your living soil with a broad base of slow and medium release nutrition, calcium, silica, and micronutrients, so the soil carries the baseline and you lean less on bottles.
Run less water-soluble feed while holding top-level, consistent production across every batch. That is what a clean, well-fed soil does for a commercial room.
Part of a bigger system
Pro Blend is step # 2 of the BuildASoil Commercial Protocol.
Start with clean soil, feed the soil, then feed the plant. See the full step-by-step system commercial growers run on over 1000 yards in production, with the plant-feeding schedule and the feed calculator.
See the entire commercial systemApplication timing
A simple, repeatable schedule you can hand to any grower on your team. One application at each step below.
Charge the soil on day one so plants have a full buffet ready.
Tighten toward every 2 weeks for higher plant density, stretch to 4 for lighter density.
Reset the soil as the plant shifts into reproductive growth.
Week 3 for faster strains, week 4 for slower strains.
Commercial value
Less than $20 per 4x4
for an entire cycle.
Four applications at 2 lbs each is just 8 lbs per 4x4 bed for the full grow. At super sack pricing of $2.30 per lb, that is $18.40 to feed the soil start to finish. Clean, compliant nutrition that pencils out at scale.
How much to apply
Grow beds
2 lbs (8 cups) per 4x4 bed.
Containers
1 cup (0.25 lbs) per 30-gallon container.
1 cup weighs 4 ounces. The 3 lb bag holds roughly 12 cups and is a good fit for the home grower. Top-dress into your mulch layer and water in.
Approximate NPK: 3-2-1 with 4% Calcium.
What is inside
Nine clean inputs chosen to work together, not just hit a label number.
Gnarly Barley
Organic sprouted seed meal flour (lentil, barley, corn), loaded with enzymes to recharge tired soil.
High Phosphorus Rice Bran
A clean, non-mined phosphorus source, the same one in our Ultra Clean Potting Soil.
Basalt
Floured rock dust that replenishes essential micronutrients.
Insect Frass
Black soldier fly larvae frass for readily available NPK plus key micronutrients.
Gypsum
Calcium and sulfur to hold soil balance and prevent nutrient excess.
Wollastonite
Calcium and silica to boost flower yield and plant strength while supporting pH.
Oyster Shell Flour
A clean calcium source that buffers pH for long-term availability.
Big 6 Micronutrients
Humic acid and micronutrients in the right ratio, no separate watering in needed.
Magnesium Sulfate
Dials in the calcium to magnesium ratio at a target 7:1 for clean uptake.
Built to pass, and we show the numbers
If you grow at scale, heavy metals are a pass or fail problem. Pro Blend is formulated to meet even the strictest standards. Here is a random sample tested for arsenic and cadmium in January 2025.
| Arsenic | 0.04 mg/Kg |
| Cadmium | 0.06 mg/Kg |
Passing heavy metal testing is never guaranteed. This product is built on the best practices that have helped top grows succeed and pass.
Feed the soil
You have enough to worry about running your business.
Load the soil with Pro Blend, run your process, and get back to consistent, clean rooms. See how it fits the full commercial system on the BuildASoil Commercial Protocol page.
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