Botanicare Pure Blend Pro Soil 1-4-5 Bloom Soil Formula -- Quart (960 mL)

Botanicare Pure Blend Pro Soil, a 1-4-5 Organic-Based Bloom Feed

Pure Blend Pro Soil is Botanicare's natural and organic-based bloom feed for plants grown in soil and coco. It is a one-part liquid, so the bottle carries a full bloom base rather than an add-on booster. The guaranteed analysis is 1% nitrogen, 4% available phosphate and 5% soluble potash. That phosphorus-forward balance answers a real soil problem. Clay colloids and soil microbes both tie up phosphorus, so a soil feed needs more of it on offer than a hydro solution does. Nutrients come from fish meal, composted seabird guano, kelp, rock phosphate and potassium, magnesium and calcium carbonates. The blend also carries 0.35% humic acid as a non-plant-food ingredient. Everything arrives in a 100% soluble form, so it passes through drippers and watering wands instead of settling out like a raw meal tea. Urea and ammonium nitrate are not part of the recipe. This quart holds 960 mL (1.00 kg) of dark, coffee-coloured concentrate with a faint organic smell.

Running the Bloom Soil Formula from Transition to Ripening

In the Botanicare coco and soil program, this formula picks up at transition, when stretch starts and the first flower sites set. The chart opens at 7.5 mL per gallon that week, then runs 20–25 mL per gallon through the heavy flowering weeks. It tapers back down over the final weeks before a plain-water finish. At the peak rate, this bottle mixes about 38 gallons of feed. It pairs with Pure Blend Pro Grow during veg and with Liquid Karma, following the label's own program. Mix the base into the water first, then add supplements, and cut the base by 10–25% when stacking several additives. In RO water or coco, the program adds Cal-Mag Plus during the first weeks. Mixed organic-based solutions are best used fresh rather than left sitting warm in a reservoir. The quart suits a tent or a handful of containers, while a full room will empty it within a couple of weeks. It is not OMRI listed, so certified-organic operations should check their own standards first.

Key Features

• 1-4-5 Bloom Analysis: Extra phosphate and potash feed flower set and bulking while nitrogen stays low enough to hold stretch in check.
• Built for Soil and Coco: The formula offsets the phosphorus that clay and soil biology lock away, which a hydro-strength feed leaves short.
• Land and Sea Ingredients: Fish meal, seabird guano, kelp and rock phosphate supply the nutrients alongside mineral carbonates.
• 100% Soluble Concentrate: The liquid mixes clean into a watering can or reservoir and runs through drip lines without clogging emitters.
• Humic Acid Included: A small humic acid fraction rides along with every feeding as a non-plant-food ingredient.
• Transition-to-Ripening Program: One bottle covers the bloom phase from the first flower sites through the taper before the final flush.

Technical Specifications