Humic Acid
Dosage Guide
Exact quantities for every container and situation.
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UsageDosageFrequencyFAQFull StoryCaution

Humic acid is used at low concentrations โ€” a small amount goes a long way. These dosage rates are calibrated for Prahas Humic Acid granules.

Soil Drench & Potting Mix

ApplicationRateFrequency
Soil Drench (containers)2โ€“3g per litre of waterEvery 3โ€“4 weeks
Soil Drench (garden beds)3โ€“5g per litre of waterEvery 3โ€“4 weeks
Potting Mix Pre-charge2โ€“3g per litre of mediumAt potting only
Transplant Drench2g per litre of waterAt transplanting

Foliar & Seed

ApplicationRateNotes
Foliar Spray1โ€“2g per litre of waterApply in morning or evening
Seed Soaking1g per litre of waterSoak 2โ€“4 hours
Seedling Drench1g per litre of waterGentle โ€” young roots only

By Garden Type

Garden TypeApplication RateMethod
Vegetable Garden3โ€“5g/L soil drenchMonthly during growing season
Container Garden2โ€“3g/L soil drenchEvery 3โ€“4 weeks
Fruit Trees5โ€“8g/L soil drenchDrench around drip line monthly
Lawn / Grass3g/L applied with watering canMonthly