Lab-grade, ready-to-fruit substrate and grain spawn from MushRealm Collective — small-batch, contamination-obsessed and shipped fast. If it isn't the best in the game, it isn't ours.
If it isn't needed, it doesn't make it into our recipes. No cheap bulk, no fluff, no cutting corners — just clean, lab-grade substrate and grain built to perform. We keep it real, we keep it simple, and we get the results everyone else only talks about.
Add your culture to the sterilized grain through the self-healing port.
Let the mycelium run through the grain, then mix into the CV Prime substrate.
Introduce fresh air and humidity — pins form and mushrooms take off.
Pick at peak, then reset for a second flush. Track it all in your Grow Dashboard.
Mix and match substrate, grain and kits to build the perfect grow for your space and species. See your bundle price update live, then add the whole thing to your cart in one tap.
Start building →A personalized tracker for every bag you own — stage-by-stage timelines, reminders for airing and misting, harvest logs and reorder timing. Real growers, real answers, right when you need them.
Open your dashboard →"First grow ever and it flushed like crazy. The grain was spotless and the dashboard told me exactly when to fan. Hooked."
"CV Prime is the most consistent substrate I've used. Zero contam across four bags. Shipping was stupid fast too."
"Emailed a question at 11pm expecting nothing — got a real answer from a real grower by morning. That's rare."
Use code FIRSTGROW at checkout on your first order. Lab-clean, guaranteed to arrive contamination-free.
Shop the line-up →Everything you need to grow gourmet & functional mushrooms — clean, consistent and ready to run.
Substrate + spawn bundled — the complete starter.
Shop kits →CV Prime bulk substrate, pasteurized & ready to fruit.
Shop substrate →Sterilized, filter-patch grain with self-healing ports.
Shop grain →