Plant Doctor Humic / Humate Powder - Soluble [size: 4.5kg]

In Stock


Calculate Shipping

Humic Acid (soluble powder)

  • 100% ORGANIC

Humics are the most natural and organic way to provide plants and soil with a concentrated dose of essential nutrients, vitamins and trace elements. They are complex molecules that exist naturally in soils, peats, oceans and fresh waters. The best and most concentrated sources of humic acids are derived from a compressed organic compound known as Leonardite derived from fresh water deposits. Leonardite is the completely decomposed remnants of living organisms derived from 70 million years of humification. Like manures and other organic compounds are used to build richly fertile compost, so too Leonardite is the end result of nature’s own composting derived at a time when the earth had minimal pollutants. As a comparison, Peat is derived from only a few thousand years of decomposed organic matter. Plant Dr Humic will help you grow plants like never before.



  • Powerful chelating agent when soil applied.
  • Increases root growth and healthy root development for increased access to soil nutrients.
  • Increases & stimulates beneficial microbial activity & quickly reduces harmful microbes.
  • Increase soil moisture retention.
  • Increases yield and plants immune system.
  • Stimulate cell elongation and division.
  • Detoxifies various pollutants in the soil (herbicides, pesticides, heavy metals, etc.)
  • Buffer soil pH.
  • Increase crop yield.
  • Build and repair soil structure.
  • Helps bind salt



  • When organic carbon levels are low
  • When valuable soil nutrients are locked up and unavailable
  • When strong new root growth is needed
  • Reduce disease
  • Apply with fertiliser


  • Can be used at any time of the year on all plants.
  • Can be applied to all crops, including vegetable crops, trees and vines. Staining may occur.
  • Can be used to all soil types.
  • Compatible with almost all fertiliser, nutrients, pesticides, herbicides, fungicide and defoliants.
  • Can be mixed with almost all liquid fertilisers and liquid nutrients, including seeding, pre-planting, side dress and water runs.




Soluble Powder

Granular - insoluble

Foliar: mix 1-3kg/1000 Litres water, fortnightly

Soil/Fertigation 5-10kg/1000 Litres water, apply fortnightly

Salt problems 1-3kg/1000 Litres water, apply fortnightly

Home Garden 10-30gm/10 Litres water, weekly

New plants 20gm/Litre water, weekly

Vegetables: 50-150kg/1000㎡

Fruit: 150-200kg/1000㎡

Cereals: 75-150kg/1000㎡

Industrial Crops: 75-200kg/1000㎡



Humic Power

By: on 2 August 2019
Using in conjunction with other PDr products. Mixes well after making 3L batches. Soil activity has really improved. Will continue to use in lawn mix.

Deep green /great soil

By: on 18 June 2019
Feeding this to my lawn really helped bring out the deep green colour and you can see it really helps release the available nutrients in the soil ... great product

Great old fashioned service

By: on 7 February 2019
So I only just received this product so I can’t really review it .but the service I received was fantastic and the guys here really do care about every customer ,I only ordered 1kg of the product but they treated me the same as a customer that spent a $1000 . Just wanted to let you guys know ,keep up the great work

The Black Stallion

By: on 2 January 2019
This stuff is great. As I use a backpack sprayer to apply I mix amount I need in a bucket with a few liters of water, mix with a stick and then while preparing my other plantdoc products it dissolves completely. This has brought great balance and health to the soil. Seen an increase in worms which is great. Grass seems to be less brown and less sunburn spots in the hot days.

Humic powder

By: on 5 November 2018
Great product easy to use,been applied with your liquid iron and stimulizer have noticed a big change in the lawn

Write a product review

Others Also Bought

More From This Category