Australian Hardwood Pellets (HWFP) for Mushroom Substrate

• Substrate prep that takes minutes rather than hours — add water, wait, done
• A dust-free mixing process — no sawdust clouds, no respiratory issues, no fine particles settling on your work surface
• Consistent substrate texture and moisture level batch after batch — pellets hydrate evenly rather than forming wet and dry pockets
• Strong, healthy mycelium colonisation in clean, uncontaminated runs
• The flexibility to build your own blend — start with HWFP as your base and customise supplementation to your species, method and skill level

Why pellets outperform raw sawdust for substrate: The pelleting process subjects raw hardwood sawdust to high heat and mechanical pressure to form a compressed cylinder — no binders required for pure hardwood, which holds its shape through natural lignin binding. This process does two useful things for mushroom growers. First, the heat and pressure partially sanitise the raw wood material — reducing the ambient microbial load before sterilisation or pasteurisation even begins. Second, the compressed format means the sawdust particles are intimately bonded, and when rehydrated they break apart into an evenly dispersed, fine-grained substrate with ideal air pockets for mycelial gas exchange. Raw sawdust often clumps unevenly, creating anaerobic zones that invite contamination. Hydrated pellets don’t.

Why hardwood specifically: Wood-loving mushroom species evolved to digest the lignocellulosic structure of hardwood — the combination of cellulose, hemicellulose and lignin that makes up the cell walls. Their enzymatic toolkit is built for it. Softwoods (pine, cypress) contain resins and terpene compounds that inhibit mycelial growth in most species. Pure hardwood sawdust provides the nutritional and structural substrate these species need without the chemical interference.

Dry pellets	Water to add	Wet substrate yield	Fills approx.
850 g	1,300 mL (1.3 L)	~2.15 KG	One 2.2 KG grow bag
1 KG	1,530 mL (~1.5 L)	~2.5 KG	One large grow bag
2 KG	3,060 mL (~3 L)	~5 KG	Two large grow bags
5 KG	7,650 mL (~7.5 L)	~12.5 KG	Five large grow bags
10 KG	15,300 mL (~15 L)	~25 KG	Ten large grow bags

Target field capacity: ~60% moisture. Adjust slightly if using supplemented blends — soy hulls absorb water at a slightly different rate.

Species	Works on HWFP alone?	Better with supplementation?
Oyster mushrooms (all varieties — Pearl, Pink, Yellow, Blue, King)	✅ Yes	Moderate boost from soy hulls
Lion’s Mane (Hericium erinaceus)	✅ Yes	Best results on HWFP alone or light supplementation
Shiitake (Lentinula edodes)	✅ Yes	Prefers minimal supplementation — HWFP suits it well
Chestnut (Pholiota adiposa)	✅ Yes	Good yields with moderate soy supplementation
Pioppino (Agrocybe aegerita)	✅ Yes	Benefits from light supplementation
Enoki (Flammulina velutipes)	✅ Yes	Works well on HWFP with light bran addition
Reishi (Ganoderma lucidum)	✅ Yes	Slow but consistent on pure hardwood

Blend	Recipe	Best for	Sterilisation
HWFP base	100% HWFP + water	Shiitake, lion’s mane, reishi, enoki — or any species where you want minimal supplementation	Pasteurisation ✅
Masters Mix 70/30	700g HWFP + 300g soy hulls per KG	Oysters, chestnut, pioppino — strong mycelial growth, higher yields, accessible preparation method	Pasteurisation ✅
Masters Mix 50/50	500g HWFP + 500g soy hulls per KG	Maximum yield from oysters and other fast-fruiting species — highest supplementation level	Autoclave / pressure cooker required ⚡
Bran supplemented	HWFP + up to 20% wheat or oat bran	Shiitake, pioppino, enoki — bran adds a different nutrient profile to soy hulls	Autoclave / pressure cooker required ⚡

♻️ Don’t throw away your spent substrate

Once your bags have finished fruiting, the spent substrate is far from waste. Partially digested hardwood substrate is an excellent addition to compost — the mycelium has already begun breaking down the lignin and cellulose, making it more accessible to soil organisms than fresh woodchip. Alternatively, use it directly as a moisture-retaining garden mulch around trees and shrubs, or dig it into bed soil to improve structure and feed fungi. A closed loop from grow room to garden.

Store in a cool, dry location away from moisture. Hardwood pellets are highly hygroscopic — they will absorb ambient humidity and begin to break apart before you’re ready to use them if left exposed. Keep bags sealed until use. For larger quantities (5KG+), transfer unused pellets to a sealed food-grade container or resealable bag. A dry shed shelf or indoor storage area is ideal. Do not store directly on concrete floors where ground moisture can wick through packaging.

Size	Wet substrate yield	Best for
1 KG	~2.5 KG wet	Single bag grows · testing a new species or substrate recipe · first-time growers
2 KG	~5 KG wet	2–3 bag runs · regular hobby grower · good trial size for blending experiments
5 KG	~12.5 KG wet	Serious hobbyist or small commercial operation · 5–6 bag runs · best value for regular production
10 KG	~25 KG wet	Commercial growers · large autoclave loads · stock for 2–3 months of consistent production · lowest per-kg cost

Kai Kai Farm is a family operation run on Tamborine Mountain in Queensland’s Scenic Rim. We grow gourmet mushrooms commercially — lion’s mane, oysters, pioppino, chestnut — and we supply the growing community with the same substrates, bags and inputs we use in our own production.

We stocked these hardwood pellets because we needed them ourselves and couldn’t find an Australian supplier we were satisfied with. We found the right source, tested them across multiple species and sterilisation methods, and put them on the shelf once we were confident in the results. That’s the standard we apply to everything we sell.

Whether you’re running one bag on a pressure cooker or twenty bags through a commercial autoclave, these are the pellets we’d use. They’re the pellets we do use.