just adding woodchips or sawdust is probably the only kind of maintenance that's realy necessary to keep it going on.
Great results were seen from using a plastic mesh potato sack full of mixed hardwood chips (beech, oak and maple) that were pre-fermented by fully submerging them in rainwater for a couple of months in plastic bin with a tightly fitting lid. The sack was weighted down with a brick or two to keep the therein contained chips under water, and some kind of plastic basket helped to keep the bricks in place on top of the sack.
After the fermentation period was complete, the sack was removed from the now stinking water, and the brown slime which coated the chips was washed off using a hosepipe attached to a chlorinated mains water supply. Once the chips had been freshened up nicely, they were placed in a large, opaque plastic tub of somewhat more than four times the volume of the chips, such that they formed a layer about 15-20 cm deep. This tub had small drainage holes in the corners, and was fitted with an elasticated cover of polypropylene 'tarpaulin'.
To inoculate the tubs, a mycelial culture previously had been prepared from either a tissue sample or stem butts from an earlier accession, by allowing the mycelium first to colonise corrugated cardboard which had been soaked with freshly boiled water, then drained, rinsed and cooled. After several weeks, the colonised cardboard was used to inoculate hickory smoker chips which had been boiled until fully hydrated (they sink). The boiled chips were placed in new, clean, plastic takeaway (takeout?) boxes along with a piece or two of colonised cardboard per box. These took a couple of months to colonise, so the sacks of wood chips could be placed to ferment immediately after preparing these inoculation cultures.
One final touch, once the large tubs were fully colonised, was to add a thin casing layer of damp, brown forest leaves. This method worked for Ps. cyanescens, as well as Ps. ovoideocystidiata, the latter of which, with its highly aggressive mycelium, could be fed almost continuously with all sorts of woody (and even certain non-woody) debris, including used paper tissues,
tropical hardwood spoons and human hair! It rather does make one wonder if it would consume corpses of small animals, and even without that it makes a rewarding species for experimentation with other unusual substrates, since it also appeared to be attacking the plastic tub - maybe the plasticisers were tasty, at least?
The main growing tub was kept somewhere sheltered and permanently shaded, but still getting plenty of fresh air. Casual cultures in wood-chip-mulched planter troughs gave fewer and smaller fruits, in accordance with the bulk of substrate available. The large tub could be topped up - after first removing the casing layer - with an inch or two of new, soaked/fermented chips for several years.
For further information, refer to the works of Paul Stamets, and also a very nice little book by L. G. Nicholas & Kerry Ogame.