Soil people, same as you.
Soil Supply Co. started because we got sick of paying premiums for inputs that under-delivered. If we wouldn't put it in our own soil, it's not on the shelf.
Our Seaweed Amino Concentrate blends three of the most productive raw materials in organic horticulture: Ascophyllum nodosum, a cold-water kelp from the North Atlantic; Sargassum, a warm-water brown macroalga; and a protein hydrolysate rich in free amino acids. Ascophyllum is the most widely used seaweed biostimulant of all, valued because the harsh intertidal zone it grows in forces the plant to load its tissue with protective compounds — the same compounds that make it so useful on land. Its extract is a natural source of phytohormones, polysaccharides and readily absorbed minerals, and pairing it with a protein hydrolysate stacks a concentrated dose of amino acids and short peptides on top.
That mix is what makes this a biostimulant rather than a straight fertiliser. Rather than pushing a heavy N-P-K load into the soil, it delivers small, biologically active quantities of the signals a plant uses to regulate itself — auxins, cytokinins and gibberellins from the seaweed, plus betaines and mannitol that help plants hold up under drought and osmotic stress. The amino acids and peptides carry a mild hormone-like activity, boost nitrogen uptake, and chelate minerals like iron and zinc so they're taken up more efficiently through roots and leaves. Working with the plant's biology this way, a modest rate delivers steadier growth, stronger roots, better fruit set, more vibrant colour and aroma, and real resilience under heat, cold or transplant shock — without overloading soft growth.
3.59 – 0.19 – 0.31
Total organic matter 60.81% · Nitrogen (N) 3.59% · Phosphorus (P) 0.19% · Potassium (K) 0.31% · Protein hydrolysate 22.45% w/v · Amino acids 11,310 mg/L · Sulphur 33,300 mg/L · Zinc 13,218 mg/L · Magnesium 6,800 mg/L · Manganese 6,015 mg/L · Iron 5,313 mg/L · Copper 3,610 mg/L · Sodium 3,522 mg/L · Calcium 1,257 mg/L · Molybdenum 13 mg/L · Boron 1.41 mg/L · Phytohormones 20 mg/L · pH 3.2
Biostimulation — supports nutrient uptake, growth, fruit set, aroma and colour, and tolerance to heat, cold and transplant stress
As a root drench, use 2.5 mL per litre of water (25 mL per 10 L watering can), soaking the soil around the root zone to drive vegetative or flowering growth — repeat up to a few times a week. To improve germination, soak seeds at 3 mL per litre (30 mL per 10 L) for a few hours, or overnight, before planting. As a foliar feed, apply 1 mL per litre (10 mL per 10 L) over the tops and undersides of the leaves, which absorb it readily through the cuticle; spray in the early morning or late afternoon when the wind is low, and avoid the heat of the day or spraying within a few hours of rain. Foliar and drench applications can both be used a few times a week.
Soil Supply Co. started because we got sick of paying premiums for inputs that under-delivered. If we wouldn't put it in our own soil, it's not on the shelf.