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Our Portobello is a first-generation Agaricus bisporus isolate, the same species sold as white button, cremini and portobello depending on when you pick it. It's a compost-loving secondary decomposer that needs a casing layer to pin, which makes it a project for growers ready to move past wood and straw species.
Pick it as a white button, let it go to cremini, or let the caps open into full portobellos.
Thick, meaty caps that grill, stuff and sear better than almost any other mushroom.
Compost substrate and a casing layer teach the techniques behind commercial mushroom farming.
Let the syringe reach room temperature, then shake it gently to break up and spread the mycelium through the broth.
Flame the needle until it glows, let it cool a few seconds, and wipe the injection port with the included alcohol pad.
Use 2–3cc per quart jar or 3–5cc per 3–5 lb grain bag. One 10cc syringe inoculates about 2–4 containers.
Keep it at 70–75°F in the dark. Shake once at about 30% colonization to speed things up.
Don't skip the casing: once the compost is fully colonized, cover it with a moist layer of peat moss and lime. Without casing, Portobello simply won't pin. This is the step that catches most first-time growers.
From our lab to your grainRun it into jars with wide-mouth cultivation lids or your own lids with self-healing injection ports. Spare 16G needles and sterile Luer Lock syringes are sold separately.
Use 2–3cc per quart grain jar and 3–5cc per 3–5 lb spawn bag. One 10cc Portobello syringe inoculates roughly two to four containers. Using more doesn't speed colonization much; it just uses up the syringe.
16–20 days at 70–75°F. After the substrate is colonized and cased, expect 20–28 days to harvest at 55–65°F.
Composted manure and straw. Portobello is a secondary decomposer and wants material that's already partly broken down, not fresh wood. Top it with a peat moss and lime casing layer.
They're all Agaricus bisporus picked at different stages. Young and closed it's a button, a little later it's a cremini (baby bella), and fully opened with dark gills it's a portobello.
Refrigerate it at 35–45°F in the bag it shipped in and never freeze it; freezing ruptures the cells and kills the culture. Bring it to room temperature and shake gently before you inject.
Liquid culture is living mycelium from an isolated culture, so it skips germination, colonizes days faster and gives genetically consistent fruits. Spores have to germinate and pair up first, which is slower and more variable from grow to grow.
Liquid culture is living mycelium, so every syringe leaves our lab in a foil-lined insulated mailer. The insulation buffers it against summer heat in a delivery truck and against sub-freezing winter temperatures, so it arrives viable either way.
When it arrives: refrigerate the syringe at 35–45°F until you're ready to inoculate. Never freeze it. Bring it to room temperature and shake gently before use.
Its very hard to find "strong" genetics for this mushroom. Other vendors have them but they are weak and do not colonize well or even produce much. This strain is aggressive and did not disappoint! Growing these is a whole different process and I don't reccommend using if you dont have a plan.
Price: $12.50
Price: $11.50