Beech Woodchips

Pure European beech woodchips (Fagus sylvatica), the hardwood of choice for wood-loving mushrooms. Pick the chip grade that matches your cultivation stage — fine 3 mm for spawn and grain-to-wood transfers, or coarse 10 mm for bulk beds and wood-to-wood transfers. Both grades ship in clean, kiln-dried 10 L bags ready to pasteurise or sterilise.

Which thickness do you need?

3 mm — spawn and grain-to-wood

The fine 3 mm grade has the high surface area mycelium needs to colonise quickly from a grain spawn. The smaller particle size keeps moisture even and reduces dead air pockets, which is what you want when running a grain-to-wood (G2W) transfer or producing your own chip spawn to seed larger projects. This is the format that behaves most like a fine sawdust spawn — fast colonisation, predictable, and the best match for indoor bag cultivation of Hericium erinaceus (Lion's Mane), Ganoderma lingzhi (Reishi) and supplemented hardwood blocks.

10 mm — beds and wood-to-wood

The coarse 10 mm grade is the conventional chip size for outdoor mushroom beds and wood-to-wood (W2W) transfers. Larger chips create the air gaps and slower decomposition that a 7–13 cm deep bed needs to fruit reliably over multiple years. Use 10 mm when you are expanding a colonised batch onto fresh substrate (W2W), building chip beds for Stropharia rugosoannulata (Wine Cap / Garden Giant), or layering chips under straw for outdoor Pleurotus (Oyster) and Lentinula edodes (Shiitake) bed cultures.

Product specifications

• Net volume: 10 L bag (each grade)
• Species: pure European beech (Fagus sylvatica), no fillers
• Chip sizes: 3 mm screened or 10 mm screened
• Treatment: untreated, kiln-dried, free of resins and tannins
• Use: bulk substrate for wood-loving fungi after pasteurisation or supplemented sterilisation

How to prepare beech woodchips

1. Hydrate — soak chips in clean water for 12–24 hours until fully saturated
2. Drain — let excess water drain off to "field capacity"
3. Pasteurise — heat to 65–82 °C for 1–2 hours (hot-water bath or oven), or supplement with bran and pressure-sterilise at 121 °C / 1 bar for 90–120 minutes
4. Cool — drop the substrate to 24–27 °C before inoculation
5. Inoculate — combine with fully colonised grain spawn (3 mm) or colonised chip spawn (10 mm) at 1:5 to 1:10 by weight
6. Incubate — keep at 22–26 °C in the dark until fully colonised (3–8 weeks depending on species)
7. Fruit — induce pinning with cooler temperatures, light and fresh air

Pair with grain spawn

Both grades colonise reliably when paired with vigorous grain spawn — a sorghum or rye grain spawn bag is the standard pairing for hardwood chip substrates. For 10 mm outdoor beds, expand a colonised 3 mm bag into the 10 mm chip bed via wood-to-wood transfer.

Which mushrooms grow on beech woodchips

Beech is the textbook hardwood substrate for a wide range of wood-loving fungi, from gourmet and functional species to wild wood-loving Psilocybes.

Gourmet & functional wood-lovers — beech is the classic substrate for:

• Hericium erinaceus — Lion's Mane (indoor bag, 3 mm grade)
• Ganoderma lingzhi — Reishi (supplemented hardwood block, 3 mm grade)
• Lentinula edodes — Shiitake (chip bed or supplemented sawdust)
• Pleurotus ostreatus — Oyster mushroom (chip + straw bed)
• Stropharia rugosoannulata — Wine Cap / Garden Giant (10 mm outdoor bed)
• Flammulina velutipes — Enoki

Wood-loving magic mushrooms — beech is a documented host for several outdoor wood-loving psilocybes that thrive in deciduous hardwood chip beds:

• Psilocybe cyanescens — Wavy Caps. Classic outdoor wood-lover on hardwood mulch beds (oak, beech, alder), 10 mm chips layered 7–13 cm deep, fruits in cool autumn temperatures.
• Psilocybe azurescens — Flying Saucers. Deciduous wood-chip and dune-grass specialist; alder and beech chips are the textbook outdoor substrate.
• Psilocybe ovoideocystidiata — Ovoids. Hardwood-mulch dweller (oak, maple, beech), well-rotted chip beds.
• Psilocybe serbica / Psilocybe subaeruginosa — additional wild wood-loving psilocybes documented on hardwood and mixed deciduous debris.

For manure-loving species like Psilocybe cubensis, Psilocybe natalensis and Psilocybe mexicana, beech woodchips are not the right substrate — a coir-based CVG mix is the correct choice instead.

Storage

Keep the unopened bag in a cool, dry place, away from direct sunlight. The chips have a shelf life of 12+ months when stored dry.