Golden Oyster, also sold as Yellow Oyster or tamogitake, fruits in tight bouquets of canary-yellow caps. It's a warm-weather grower that colonizes quickly and fruits easily, which makes it one of the most rewarding cultures to start with.
- P. citrinopileatusSpecies
- 5–8 daysTo cover a plate
- 65–80°FFruiting temp
- BeginnerSkill level
- 8–10Plates from one
Why start with our Golden Oyster plate
Quick to colonize
Covers a plate in 5–8 days at 75–80°F and finishes grain in about 7–12.
Warm-room friendly
Fruits best at 65–80°F, which makes it a natural summer crop.
Worth the harvest
Nutty, with a cashew-like note. It's best cooked dry over high heat.
Plan your harvest: Fresh Golden Oysters only keep 2–4 days. If you sell them, aim to move them within 24–48 hours of picking.
Where one plate can take you
1Grain jars or bags
Cut a wedge about the size of a pencil eraser for each quart jar or bag of sterilized grain. Expect full colonization in about 7–12 days (kept warm).
2Liquid culture
Drop a small wedge into sterilized broth to grow a liquid culture you can draw syringes from.
3More plates
Slice the culture and transfer the pieces to fresh agar. One plate typically yields 8–10 new plates for a backup library.
4Pick the best
Choose the fastest, cleanest-looking growth and carry only that section forward to keep the line strong.
Golden Oyster plate specs
| Spec | Detail |
|---|
| Scientific name | Pleurotus citrinopileatus |
| Genetics | First-generation isolate from our master culture |
| Medium | Malt extract agar (MEA), about 18 mL |
| Dish | 90mm polypropylene, sealed with Parafilm |
| Mycelium appearance | White to pale yellow, fluffy, with ropey edges |
| Time to cover agar | 5–8 days at 75–80°F |
| Time to colonize grain | 7–12 days (kept warm) |
| Fruiting temperature | 65–80°F |
| Fruiting substrates | Straw, hardwood sawdust, supplemented pellets, Master's Mix |
| Skill level | Beginner |
| Storage (sealed) | 60–90 days at 55–70°F in the dark; 6–9 months refrigerated at 35–40°F |
| Ships | Within 1 business day by USPS Priority Mail |
Common questions
Is Golden Oyster the same as the Chestnut mushroom?
No. Chestnut is Pholiota adiposa, a different genus with brown, sticky caps.
Can I keep the plate in the fridge?
It handles cold less well than Blue Oyster. For long storage keep it near 40°F and refresh it onto new agar every 4–6 months.
How long can I keep the plate before using it?
Left sealed and stored somewhere dark at 55–70°F, it stays viable for 60–90 days. In the fridge at 35–40°F it holds for 6–9 months. Golden Oyster is more cold-sensitive than Blue Oyster, so keep long-term plates near 40°F and refresh every 4–6 months.
What if my plate arrives contaminated?
Every plate is inspected before it ships. If you see green or black fuzz, a pink or orange sheen, wet spreading patches or a sour smell, email us a photo within 5 days of delivery and we'll replace it free.
Made in our lab, shipped fast
We pour each plate with about 18 mL of agar, inoculate it in front of HEPA-filtered laminar flow, seal it with Parafilm and grow it out in a dedicated clean room. It's 90mm, using a polypropylene dish that flexes instead of cracking, so a bump in transit won't split the plate and break the seal. Every plate gets a visual check before packing, and anything questionable is discarded instead of shipped. Most plates show 90–100% coverage when they ship.
Because we keep colonized plates in stock instead of starting them when you order, yours usually leaves the lab within one business day. Plates travel by USPS Priority Mail, typically 2–4 days, in insulated, padded packaging, with a free cold pack from May through September and for hot-climate addresses. Orders with several items can take an extra 1–2 business days.
Golden Oyster on MEA
The clusters it grows into
When it arrives: Look it over within 24 hours. A little condensation on the lid is normal. Keep it sealed, cool and dark at 55–70°F until you're ready to work.