A natural, organic way to boost your soil and plant health. *For agricultural use only
Made from Leonardite, a 70-million-year-old natural organic compound, these granules deliver a concentrated dose of nutrients, trace elements, and vitamins straight into your soil. They help plants grow stronger roots, improve soil structure, and enhance nutrient availability, perfect for gardeners, farmers, and landscapers who want healthier plants and higher yields. Safe to use near children and animals, Humic Acid Granules are an easy, organic solution to reviving tired or nutrient-poor soils.
Lawns (Buffalo, Couch, Kikuyu & More)
Gardens (Veggies, Flowers, Trees, Pots)
Farms & Larger Properties
Humate / Humic Acid Granules work by improving soil health, nutrient availability, and plant resilience. They not only support strong root systems and microbial activity but also enhance fertiliser efficiency and overall crop productivity. Key benefits include:
| Attribute | Value |
|---|---|
| Product Type | Humic Acid Granules (45–50%) |
| Source | Leonardite (natural organic deposit) |
| Particle Size | 2–4mm |
| Best For | Soil fertility, root growth, nutrient chelation, and detoxifying soil |
| Application | Side dressing, pre-planting, fertigation, soil amendment |
| Organic Status | Certified Organic, sustainable |
| Safe For Use Near | Children, animals |
| Origin | Made in Australia |
Restore Your Soil & Boost Plant Health. Humate / Humic Acid Granules bring your soil back to life, unlocking nutrients, feeding beneficial microbes, detoxifying contaminants, and promoting stronger, healthier plants. Perfect for lawns, gardens, orchards, and farms, it’s the organic solution for thriving soil and maximum yields.
May be harmful if swallowed. If eaten seek medical help. ALWAYS TRIAL BEFORE CHANGE. 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.
STAINING WARNING: Staining may occur during application.
(513)
| Application Type | Rate |
|---|---|
| Lawn & Turf: | 2.0-5.0kg/100sqm (200-500kg/Ha) |
| Plants & Garden: | 2.0-5.0kg/100sqm (Handful/pot) |
| Potting Mix: | Add at 2.5-10% (0.5 - 2.0kg/25 litres or 20-80kg/m³) |
| Vegetables: | 1.25-3.75kg/100sqm (125-375kg/Ha) |
| Fruit: | 3.75-5.0kg/100sqm (375-500kg/Ha) |
| Cereals: | 2.0-3.75kg/100sqm (200-375kg/Ha) |
| Broadacre: | 2.0-5.0kg/100sqm (200-500kg/Ha) |
| APPLY EVERY 3 MONTHS | |
Humic acid granules are a concentrated organic soil conditioner derived from natural leonardite. They improve soil structure, increase nutrient retention, and stimulate microbial activity.
Humate enhances nutrient availability, boosts root growth, improves soil aeration, and increases water-holding capacity. It's ideal for improving sandy, clay, or compacted soils.
Yes. Our Humic Acid Granules are certified organic and safe for use in all gardens, including organic food production, native landscapes, and eco-conscious lawn care.
All soil types can benefit, but it's especially useful in sandy soils (to hold nutrients and water) and clay soils (to improve structure and drainage).
Yes. These granules are safe for all plants, including lawns, veggie patches, fruit trees, natives, and ornamentals. They improve overall plant health without burning roots.
Humic acid can be applied regularly throughout the year as part of your soil conditioning program. Refer to our Product Usage Guide for seasonal advice.
Yes. Humic acid enhances the efficiency of other fertilisers by helping them stay in the root zone longer and making nutrients more available to plants.
Absolutely. Humate granules are excellent for rebuilding soil organic matter and long-term soil fertility. They support microbial activity and healthier plant growth.
You can spread them by hand or with a broadcast spreader and water them in well. They are suitable for lawns, garden beds, tree plantings, and even native areas.
No, humic acid is not a fertiliser in the traditional sense. It doesn’t supply NPK nutrients directly but improves how plants access and absorb nutrients already present in the soil or from added fertilisers.
Amount of Reviews: 14
Money Back Guarantee
Put your mind at ease with our 100% 90 day money back guarantee
Australian Owned
Australian family owned and operated. Online sales since 2009.
Flat Rate Shipping
Flat-rate shipping from $9.95* Fast and affordable!
*For items 1 kilo or less shipped within Australia. $14.95 for above 1kg. Excludes some regional areas.
Same Day Dispatch
Same day dispatch Australia wide for orders received before midday*
*Monday - Friday (Excludes Public Holidays)
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.
Will definitely be getting more 8 weeks difference been using stimulizer, activ8mate, soil wetter, seaweed secrets and champion fertiliser. Was super fast delivery.
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!
Sign-up for exclusive deals and the latest news.
