GRUMPY
GILLS
FUNGI

A full digital grow library, live right now — honest guides & free calculators. Gourmet & medicinal cultures coming soon.

The best part: you get to eat it. 🍳

A dry sauté in a hot pan, a little butter, fresh thyme — home-grown oyster and king oyster caramelized right to the edge of crisp. The 125-recipe cookbook turns every flush into dinner.

Use 70% isopropyl, not 91% or 99%. The extra water lets the alcohol soak into cells and kill them instead of flash-evaporating — the "weaker" bottle actually sterilizes better.

Leggy stems + tiny caps = too much CO₂, not enough fresh air. Move the block somewhere more open and fan it a few times a day — young mushrooms often correct within 24–48 hours.

Green means gone. Trichoderma starts white and fuzzy like healthy mycelium, then turns vivid blue-green in 2–3 days. Once you see green, bag it and toss it — don't open it indoors.

Pasteurize substrate overnight with zero equipment: pack straw in a pillowcase, pour boiling water over it in a heavy cooler, and it holds the 149–167°F band all night.

Biological efficiency = fresh weight ÷ DRY substrate weight. The #1 reason beginners think they failed is doing this with WET weight (4–6× heavier), making a perfectly good grow look like a disaster.

That's the free stuff. The guides go all the way.

Wild, careful & grumpy about quality.

Same trusted name folks already know. Now Grumpy's handing over the whole playbook — every tek, every honest number, every hard-won lesson from years on the bench.

Everything Grumpy knows, written down.

The real bench process, start to finish — culture to harvest, contamination to clean room — with printable lab sheets for your wall. No filler, no gatekeeping, yours forever.