I've noticed instant results and improvements in all areas of my garden since adopting the HPO methodology
The girls LOVE this product and great at all stages.
GRO-DIRT Lite – Organic Living Soil
GRO-DIRT Lite is a premium adaptive living soil formulated for early vegetative stages, rooted clones, and growers who prefer to steer crop performance with topdressings, liquid feeds, or compost teas. Featuring a finely tuned structure for improved drainage, lighter texture, and optimized CEC, it supports responsive fertilization without sacrificing biological integrity. Enriched with humified biodynamic compost, mycorrhizal fungi, Trichoderma, and a complete probiotic suite, GRO-DIRT Lite offers 4–6 weeks of baseline nutrition while maintaining an active, microbe-rich rhizosphere—making it the perfect foundation for high-performance cultivation.
GRO-DIRT Lite – Organic Living Soil
Sale price$40.00 AUD
Where biology, minerals, and science collide.
Explore the Edge of Organic Innovation & Cultivation
GRO-DIRT
LITE
GRO-DIRT Lite is a 100% organic, microbe-rich living soil designed for rooted clones, seedlings, and growers who prefer to steer crop performance with liquid feeds or top dressings. Formulated with premium biodynamic compost and a lighter structure than the original GRO-DIRT, it supports strong vegetative growth while allowing for responsive nutrient inputs. Ready to use out of the bag, it delivers 4–6 weeks of water-only nutrition and is ideal for high-performance cultivation with full biological integrity.
Organic Doesn’t Mean Underpowered
We reject the outdated notion that organic cultivation is slow, weak, or imprecise. Our living soils are not just rich in nutrients — they’re engineered ecosystems, biologically primed to deliver consistent, high-performance results across any growing style. While conventional soils often rely on synthetic inputs or sterile blends, GRO-DIRT leverages advanced composting, high-density microbial consortia, and carefully balanced mineral ratios to drive nutrient cycling, hormonal signaling, and root-zone synergy. This means faster establishment, denser growth, and higher-quality yields — all without the burn or crash cycles seen with chemical programs.
Is GRO-DIRT Lite the right soil for you?
If you’re growing in pots or planters and want a refined soil that supports early growth with minimal effort, GRO-DIRT Lite is the one. Designed for flexibility and control, this blend performs beautifully in veg and early bloom — especially when paired with liquid feeds. It provides 4–6 weeks of nutrition using just water, making it ideal for seedlings, clones, and young plants. With a carefully screened, softer-textured base and optimized drainage, it balances moisture and air perfectly in smaller containers. This is smooth, consistent, microbe-safe tech — built for modern growers who want to steer the crop their way.
Best for: Seedlings, young plants, small containers, liquid-feed systems, early-phase water-only growing.
The Science Behind GRO-DIRT
At the core of GRO-DIRT’s performance is not just what goes into it — but how it’s made. This isn’t your average soil mix. Every step, from fermentation to microbial inoculation to structural engineering, is guided by rigorous process control, scientific precision, and biological insight. Below, we unpack the key technologies and methods that make GRO-DIRT a category-defining living soil — purpose-built for serious growers who demand more from their media.
GRO-DIRT is fortified with over 15 unique fermented inputs — including horsetail (Equisetum), dandelion, comfrey, alfalfa, Kelp, hops, and ocean minerals (Sea-90). These aren’t raw plant powders or basic KNF — they’re processed in controlled microbial fermentations, in specialised temperature-controlled custom reactors using our own EM1 cultures. The result: living metabolites, enzymes, trace minerals, and plant signalers that boost growth and resilience from the root zone up.
We've significantly upgraded the way we do our IMO collections. We selectively cultured high-performing IMO lineages and scaled them under controlled conditions — locking in the best traits. Each GRO-DIRT batch is now inoculated with this custom IMO derivative, along with live in-house-grown mycorrhizal fungi and freshly fermented EM1, aerobic microbe teas along with a suite of other beneficial micoorganisms and rhizobacteria — ensuring a thriving, competitive microbiome from day one.
The trouble with trying to make a really nutritionally dense soil that can perform well on Water-Only is that all the ingredients that hold a lot of horsepower - also hold a lot of moisture (Compost, Castings, Amendments, minerals), this presents a challenge as a nutritionally dense, yet very low O2 blend means slow growth. GRO-DIRT Full Spectrum Blend uses a very carefully put together drainage profile containing multiple, Long lasting raw-ores (Like Scoria and Pumice), along with multiple Perlite grades and 3–6mm granulated cork bark — a sustainable, ultra-light, porous material that maintains ideal aeration, insulation, and microbial colonization without waterlogging or compaction. This allows us to maintain high nutrient density without compromising structure.
A premium blend of pecan shell and macadamia nut shell biochar, inoculated with fresh microbes and special protein sources, pre-activated for each batch. Presents a great contrast to most “sticks and twigs” biochar on the market, made from “tree trimmings” and unknown phytotoxicity levels. Nut shell char is sustainable, non-phytotoxic, premium, and of a consistent sizing. Pecan, we find, crumbles up and evenly distributes through the mix, with the macadamia nut acting as semi “microbe orbs” that trap ingredients and moisture, and provide a place for beneficial organisms to live and grow outward from—lasting longer term.
Each GRO-DIRT batch is made indoors using clean, custom equipment, made only to make GRO-DIRT — no tractors, bobcats and rough treatment. Amendments are hand-measured to the gram per batch (not in bulk), and each stage of the mix is portioned to within exceedingly slim margins. Multi-stage composting and curing is carried out in sealed batch bags for 6+weeks, indoors before bagging. The result: an ultra-consistent, ready to use, peak-performance soil — every time.
No Mixing. No Measuring. Just Growing.
How to Use GRO-DIRT
Simply open the bag, lightly fluff, and plant directly. GRO-DIRT is water-only from cut to harvest in most scenarios, as long as a large enough container is used. For maximum performance—and when using smaller container sizes—it can be boosted with our CROP-DRESSINGS: HERB-SUPERB & STONE-AGE, our POWR-BOOSTER soluble fertilisers: AQUA-MARINE, OCEAN-POTION, and GREEN-SUPREME, as well as our GRO-BIOTICS: RHIZO-MOJO, ANTI-MATTER, and DARK-MATTER.
Recommended Plant Pot Size for Optimal Growth: 50L Per Plant
Dial in your grow with our Dynamic Feed Chart & Soil Volume Calculator
Need to reammend your GRO-DIRT? Watch our video guide HERE.
Frequently Asked Questions
What is GRO-DIRT Lite and how is it used?
GRO-DIRT Lite is a premium living soil for seedlings, clones, and early veg. It supports responsive fertilisation with teas or liquids while maintaining rich microbial life and drainage.
How is GRO-DIRT Lite different from GRO-DIRT Full Spectrum?
Lite is physically lighter, drains faster, and holds less total nutrition—ideal for steering growth with additives. Full Spectrum is nutrient-dense and designed for water-only growing start to finish.
Does GRO-DIRT Lite contain enough nutrition for full growth?
It provides 4–6 weeks of baseline nutrition. For full-cycle growing, supplement with topdressings, compost teas, or liquid organics—especially during bloom—for optimal results.
Can I use GRO-DIRT Lite for rooted clones or seedlings?
Absolutely. It’s perfectly suited for young plants. Gentle nutrients and excellent structure promote early root development without burning or overloading fragile starts.
Is GRO-DIRT Lite compatible with compost teas and liquid feeds?
Yes. It’s designed for it. The structure and CEC allow for aggressive liquid inputs while maintaining microbial stability and avoiding compaction or salt buildup.
What microbes are in GRO-DIRT Lite?
It contains Endo/Ecto Mycorrhizae, Trichoderma, and a full probiotic suite—plus biodynamic compost rich in beneficial fungi and bacteria to build a stable, living rhizosphere.