Acid Mix 4-3-6

Down To Earth Acid Mix 4-3-6 is a blended organic granular fertilizer formulated specifically for plants that prefer or require acidic soil conditions — including cannabis, which grows best at a soil pH of 6.0–7.0 and can benefit from acid-stabilizing amendments in high-pH soils.

The 4-3-6 NPK ratio from organic ingredients includes cottonseed meal, fish bone meal, langbeinite, rock phosphate, and humic acid. Cottonseed meal and fish bone meal provide nitrogen; rock phosphate and fish bone meal supply phosphorus; langbeinite (K-Mag) delivers potassium, magnesium, and sulfur. Humic acid improves nutrient chelation and soil biology. The combination naturally tends to acidify or stabilize pH in the slightly acidic range.

Apply to soil before planting or as a top-dressing. Particularly useful in regions with high-pH (alkaline) tap water or in soils that have been repeatedly irrigated with hard water. OMRI Listed for certified organic use. Made by Down to Earth Fertilizer, an Oregon-based organic amendment company.