Plant Doctor Humic / Humate Powder

Q: Is the Humic Acid 80% Powder fully soluble in water?

Yes, it is 100% water-soluble but may require thorough mixing. Pre-mix in a jar with 100–150ml water, stir, and transfer to your application device. Repeat until fully dissolved.

Q: What is Humic Acid Powder used for in gardening and farming?

Humic Acid Powder is used to improve soil health, structure, nutrient retention, and microbial activity. It’s ideal for lawns, gardens, farms, and hydroponics.

Q: Can I use this product in my organic garden?

Yes. Plant Doctor’s Humic Acid 80% Powder is suitable for organic gardening and made from natural sources.

Q: How often should I apply Humic Acid Powder?

It depends on soil condition and plant needs, but most gardeners apply it every 2–4 weeks during active growth.

Q: Can I combine Humic Acid Powder with other fertilisers?

Yes, it enhances nutrient uptake and can be mixed with many fertilisers. Always jar test before combining.

Q: Is it safe for all plant types?

Yes, it’s suitable for all plant types including lawns, vegetables, fruit trees, ornamentals, and indoor plants.

Q: What’s the difference between Humic Acid and Fulvic Acid?

Humic Acid mainly improves soil health and structure, while Fulvic Acid enhances nutrient transport into plant cells.

Q: Can I use Humic Acid Powder in hydroponic systems?

Yes, as long as it is fully dissolved and compatible with your hydroponic system. It helps chelate nutrients and boost uptake.

Q: How should I store Humic Acid Powder?

Store in a cool, dry location out of direct sunlight. Seal tightly after use to prevent clumping.

Plant Doctor Humic acid powder - Soluble 1kg

Product Description

Humic Acid 80% (Humate) Powder – 99% Soluble

Powerful Organic Soil Detox & Nutrient Booster for All Growing Conditions

If your soil is tired, depleted, or struggling to retain nutrients, this is your natural fix. Plant Doctor’s Humic Acid 80% Powder is a 99% water-soluble humate made from premium Leonardite, one of the richest known sources of humic acids. It works below the surface to unlock nutrients, detox harmful residues, and restore soil health by feeding beneficial microbes and improving structure. Whether you're growing lush lawns, thriving veggie patches, or managing broadacre farmland, this humic acid powder will rebuild fertility, balance pH, and enhance fertiliser performance, naturally.

SAFE FOR USE NEAR ANIMALS & CHILDREN

Why choose Humic Acid 80% Powder:

Improves nutrient uptake by unlocking locked-up minerals
Detoxifies soil from chemical residues and heavy metals
Boosts microbial activity for long-term soil health
Enhances water retention and root development
Buffers soil pH to reduce nutrient stress
Binds excess salts to protect sensitive roots
100% organic and highly concentrated
Cost-effective and long-lasting- small amounts go a long way

Nutrient Profile:

Humic substances: ~80% (potassium humate base) derived from Leonardite
Contains naturally derived organic carbon compounds and trace minerals
Designed to improve soil function, nutrient availability, and biological activity

Humic Acid powder doesn't feed plants directly. Instead it functions as a:

Soil carbon builder
Nutrient chelator (unlocks locked-up nutrients)
Soil detoxifier (binds salts, residues, heavy metals)
Microbial stimulant (feeds beneficial soil biology)
Soil structure improver (aggregation + aeration)

Where to use Humic Acid Powder:

Lawns

(Buffalo, Couch, Kikuyu & More)

Breaks up compacted or dead soils to allow deeper root penetration
Boosts green-up when combined with nitrogen-based lawn fertilisers
Use after topdressing or aeration to enhance soil contact
Apply dry as a dusting, or dissolve for a soil drench

Gardens

(Veggies, Flowers, Trees, Pots)

Detoxifies raised beds and urban soils with past chemical exposure
Great for recharging tired potting mix or sandy soils
Helps keep moisture in the root zone during dry periods
Mix into compost teas or worm juice for biological activation

Farms & Acreage

(Broadacre, pastures, orchards, vineyards)

Ideal for pre-planting, side-dressing, or irrigation systems
Enhances fertiliser uptake, particularly phosphorus and trace minerals
Binds and reduces salt and chemical residues from past treatments
Compatible with most crop inputs, including fertilisers, pesticides, and fungicides

Use Humic Acid Powder when organic carbon is low, nutrients are locked up, or you need to improve water retention, especially during high-demand growth stages or when enhancing fertiliser and biological input performance, ideal for those transitioning to organic or regenerative soil programs.

The Science Behind Humic Acid Powder:

This humate powder is extracted from Leonardite, a natural deposit formed over millions of years, far more concentrated and stable than peat-based sources. Rich in short- and medium-chain humic acids, it acts as a bio-stimulant, soil detoxifier, and chelator.

Nutrient Chelation – Unlocks bound-up nutrients like phosphorus, calcium, and magnesium
Soil Detox – Binds herbicide/pesticide residues, heavy metals, and excess salts
Microbial Support – Provides carbon and substrate for beneficial bacteria and fungi
Water Retention – Improves soil porosity and reduces evaporation
pH Buffering – Helps stabilise soil pH in both acidic and alkaline soils
Structure Repair – Encourages soil crumb formation and reduces compaction

Rebuild Soil, Naturally. With every application of Plant Doctor’s Humic Acid 80% Powder, you're not just improving your plants, you’re restoring life to the soil. It’s your go-to product for long-term fertility, better nutrient efficiency, and soil resilience that lasts season after season.

Safety Guidelines

Keep out of reach of children. May be harmful if swallowed. If eaten seek medical help. ALWAYS TRIAL BEFORE CHANGE. Staining may occur. Before a new rate, product or application method is used, a small trial is recommended. Warranty of this material, either expressed or implied, is limited to a guarantee of the composition as shown on this label in as much as uses are beyond the seller’s control. For the same reason, the seller is not liable for any injury to any living thing, crops, soils, or materials which may result from the use or storage of this material. As this is largely a mineral-based fertiliser made from natural resources, the analysis may change slightly.

NOTE: not compatible with iron-based products

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Product Application

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: 2gm/Litre water, weekly	Vegetables: 50-150kg/1000㎡ Fruit: 150-200kg/1000㎡ Cereals: 75-150kg/1000㎡ Industrial Crops: 75-200kg/1000㎡

Need Help with Application Rates?

Not sure how much to apply for your lawn or garden area? Use our Plant Doctor Product Rates Calculator to get the correct rate tailored to your size and conditions.

Open Application Rate Calculator

Is the Humic Acid 80% Powder fully soluble in water?

Yes, it is 100% water-soluble, but it may require a bit of effort to fully dissolve. We recommend pre-mixing the powder in a small jar or mug with around 100–150ml of water. Stir thoroughly, then pour into your watering can or sprayer. Repeat until fully dissolved.

What is Humic Acid Powder used for in gardening and farming?

It improves soil structure, boosts nutrient uptake, and stimulates microbial activity. It’s ideal for enriching tired soils in lawns, gardens, farms, and even hydroponics systems.

Can I use this product in my organic garden?

Yes. It is derived from natural sources and suitable for organic gardening practices.

How often should I apply Humic Acid Powder?

Application frequency depends on soil condition, but every 2–4 weeks during active growth is a common guideline.

Can I combine Humic Acid Powder with other fertilisers?

Yes, humic acid enhances fertiliser efficiency and nutrient uptake. A jar test is always recommended before mixing with other products.

Is it safe for all plant types?

Absolutely. It's suitable for lawns, vegetables, flowers, trees, and even indoor plants.

What’s the difference between Humic Acid and Fulvic Acid?

Humic Acid works in the soil to improve structure and nutrient holding. Fulvic Acid is smaller in molecular size and aids in nutrient delivery within plants.

Can I use Humic Acid Powder in hydroponic systems?

Yes, if fully dissolved. It can improve nutrient chelation in hydroponics or aquaponics systems but ensure your emitters are compatible.

How should I store Humic Acid Powder?

Store in a cool, dry place out of sunlight. Reseal tightly to prevent clumping from moisture exposure.

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Amount of Reviews: 15

Plant Doctor Humic acid (Humate) Powder - Soluble

By: Phoebe on 7 February 2022

this product does very good job on my garden.I use it on fig trees,veg garden,orange trees.It helps keep the roots of plants healthy.I am very happy with this product.

Highly recommend

By: Alexander on 4 December 2020

This is an awesome product, which is great value given the application rates. As always, product was delivered promptly as well. Two thumbs up.

Fantastic product

By: Adam on 23 September 2020

Great product for the lawn, can see great results from applying over a few seasons

Excellent,fair and super-fast

By: Johanne on 23 September 2020

Excellent quality product, fair price (possibly too cheap for the quality), and super-fast delivery even in this current climate.. ill be using again.

Amazing results.

By: Brandon on 25 August 2020

Definietly see the benefits in my lawn from using humic acid

Humic Acid Powder

By: Michael on 2 July 2020

Fantastic results, will definitely be purchasing more down the track. Only need a small amount if applying with a pressure sprayer.

Humic Power

By: robert 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: phillip 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: Dan 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: Michael 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: Mark 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

Mix it up

By: Mathew on 4 November 2018

I mix with luke-warm water to make it soluble and add to other plant doctor products, my root growth has been fantastic since using this product.

Great product

By: Brett on 31 October 2018

have been using this for a couple of months now & you can really see the difference! Great value for money as a small amount goes a long way!!

Humic acid

By: Corbin on 20 October 2018

Been using this on my lawn for a few months and it has helped the soil microbiology. I have a premdominate sand based and now I get small mushrooms which indicates excellent health. Mixing with a stirer/while mixing is key as it can clump otherwise

Great product

By: Ashley on 11 October 2018

Been using this product for over 3 months on lawn and vegetables. So far results seem great. Only negative would be that it is difficult to mix up. Not that soluble.

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Customer Reviews

First time owning lawn. Gave the team at plant doctor a ring and they supplied me with a wealth of information. Products turned up quickly.

Billy Green

Will definitely be getting more 8 weeks difference been using stimulizer, activ8mate, soil wetter, seaweed secrets and champion fertiliser. Was super fast delivery.

Michael Preddy

Only have great things to say about Plant Doctor. Organic products and a competitive price, fast shipping and easy to contact with questions. Have had great results with the special mix for lawns, and my plants (indoor and outdoor) love the seaweed secrets. I am excited to test out some of the animal products soon!

Plant Doctor Humic acid powder - Soluble 1kg

Humates - the natural building blocks of life

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Product Description

Humic Acid 80% (Humate) Powder – 99% Soluble

Where to use Humic Acid Powder:

Use Humic Acid Powder when organic carbon is low, nutrients are locked up, or you need to improve water retention, especially during high-demand growth stages or when enhancing fertiliser and biological input performance, ideal for those transitioning to organic or regenerative soil programs.

Rebuild Soil, Naturally. With every application of Plant Doctor’s Humic Acid 80% Powder, you're not just improving your plants, you’re restoring life to the soil. It’s your go-to product for long-term fertility, better nutrient efficiency, and soil resilience that lasts season after season.

Safety Guidelines

Product Application

Need Help with Application Rates?

Popular Questions

Is the Humic Acid 80% Powder fully soluble in water?

What is Humic Acid Powder used for in gardening and farming?

Can I use this product in my organic garden?

How often should I apply Humic Acid Powder?

Can I combine Humic Acid Powder with other fertilisers?

Is it safe for all plant types?

What’s the difference between Humic Acid and Fulvic Acid?

Can I use Humic Acid Powder in hydroponic systems?

How should I store Humic Acid Powder?

Shipping Calculator

Calculate Shipping

Plant Doctor Humic acid (Humate) Powder - Soluble

Highly recommend

Fantastic product

Excellent,fair and super-fast

Amazing results.

Humic Acid Powder

Humic Power

Deep green /great soil

Great old fashioned service

The Black Stallion

Humic powder

Mix it up

Great product

Humic acid

Great product

Customer Reviews

Billy Green

Michael Preddy

Tim McAuliffe

Website

Service

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