Tonic Ultra is a concentrated plant growth regulator made from Leonardite sourced in North Dakota. Containing 18% humic acid and 1.5% fulvic acid, it enhances nutrient uptake, boosts plant metabolism, and improves soil structure. Ideal for fruits, vegetables, cash crops, and ornamentals, it supports sustainable and efcient farming practices.
1L, 500ml, 250ml, 100ml.