Maitake (hen of the woods)
Grifola frondosa
Large feathery autumn tufts, at the foot of old oaks. A demanding mushroom, a poor competitor, but one that slowly 'digests' a stump you don't want to grub out.
Partial shade
Role in permaculture
Turns old oak stumps and end-of-life heartwood to account, in a niche that few cultivated species exploit, oak roots and stumps.
Growing this mushroom
- Method
- Sterilised log segments, colonised then buried at the foot of hardwoods
- Substrate
- Oak above all (the natural host), also chestnut, beech, maple. The reliable route goes through wood segments sterilised then colonised in a bag, as Grifola is a poor competitor on non-sterile wood.
- Where to place it
- At the foot and on the roots of old oaks (its natural host), or against a decomposing oak stump, in shaded, rich, humid soil. A wound parasite and saprophyte of oak roots: the 'association' is the oak as support.
- Period
- Inoculation in spring, burial after colonisation; fruiting in autumn.
- Level
- Advanced
Steps
- Sterilise wood segments in a filter bag, inoculate them with Grifola spawn and let them colonise fully.
- Unmould and half-bury the block in shaded, cool soil, ideally against an old oak stump.
- Traditional variant, more uncertain: inoculate directly an end-of-life oak stump.
- Be patient: fruiting, in feathery tufts at the base, occurs in autumn, often more than a year, sometimes 2 to 3 years after inoculation, then each autumn.
Precautions
When foraging, confusions are possible (not deadly but disappointing or indigestible): the giant polypore Meripilus giganteus (which blackens when touched), the Berkeley's polypore Bondarzewia berkeleyi, or the very different sulphur polypore (Laetiporus, yellow-orange). The true hen of the woods stays tender; old, tough specimens are indigestible.
Sources: Paul Stamets, Growing Gourmet and Medicinal Mushrooms (Grifola frondosa) · North Spore ; Field & Forest Products, fiches de culture Grifola · Mycopia Mushrooms, « The History of Maitake Cultivation » · Tradd Cotter, Organic Mushroom Farming and Mycoremediation, Chelsea Green, 2014
Good companions
Traditional companion planting (benefit not demonstrated)
Nutritional & medicinal properties
For educational purposes. Not a substitute for medical advice. Effects depend on the form, the dose and personal context.
Precautions & contraindications
Always cook thoroughly. For therapeutic aims, caution: cases of interaction with warfarin (a rise in the INR) and a risk of additive effect with blood-sugar-lowering medicines have been reported, medical advice required in case of anticoagulant or antidiabetic treatment (Memorial Sloan Kettering Cancer Center, 'About Herbs' database).
Key takeaways
- • Prefers partial shade exposure.
- • Classic companion: Oak.