Golden Oyster Colonized Agar Plate
Golden Oyster Colonized Agar Plate is backordered and will ship as soon as it is back in stock.
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Description
Description
A fully colonized Golden Oyster (Pleurotus citrinopileatus) agar plate, grown from our master culture and 1st-generation isolated genetics — the same strain we use in our Golden Oyster liquid culture syringes.
Each plate is produced at our Illinois lab on standard malt extract agar (MEA), fully colonized before it ships, and held in inventory rather than made to order, so it ships within 1 business day. Multi-item orders may take an additional 1–2 business days so we can pack everything together.
- 90mmPolypropylene dish
- ~18mLMEA agar
- 5–8 daysColonizes agar
- 65–80°FFruiting temp
- 1 dayShips within
Why growers pick Golden Oyster
Golden Oyster — also known as Yellow Oyster, or tamogitake in Japanese — forms dense clusters of bright canary-yellow caps that look like a bouquet of flowers. Beyond the looks, it offers:
- Warm-weather fruiting – like Pink Oyster, it fruits well at 65–80°F when most oysters won't, making it a good summer or warm-climate species
- Fast colonization – aggressive mycelium that outpaces most contamination, forgiving even for first-time agar work
- Distinctive flavor – nutty and cashew-like with a savory depth; best in dry, high-heat cooking like roasting or pan-frying
- Dense cluster yields – fruits in tight bouquets rather than individual caps
The yellow color is unmistakable and stands out among the brown and white mushrooms typically on offer at a farmers market.
What's included
- One 90mm polypropylene Petri dish, parafilm-sealed for sterility during transit
- ~18mL malt extract agar (MEA), our standard formulation for gourmet species
- Fully colonized with Golden Oyster mycelium (typically 90–100% coverage at ship time)
- 1st-generation isolated genetics from our master culture
- Lab-inspected for contamination before it ships
When your plate arrives
- Inspect it within 24 hours. Minor condensation on the lid is normal and harmless.
- Store it cool and dark. Keep the sealed plate at 55–70°F until you're ready to use it.
- Work clean. Open the plate only under a still-air box or laminar flow hood.
- Make your transfer. Cut a small wedge, about the size of a pencil eraser, and move it to grain, liquid media, or fresh agar.
Shipping and storage: plates ship in insulated, padded packaging via USPS Priority Mail (typically 2–4 days in transit), with a cold pack included at no additional cost in summer months (May–September) or to hot-climate destinations. A sealed plate stays viable for 60–90 days at 55–70°F, or 6–9 months refrigerated at 35–40°F. Golden Oyster is more cold-sensitive than Blue Oyster, so for long-term storage keep plates at the warmer end (40°F) and refresh them every 4–6 months.
What you can do with one plate
- Transfer to grain – place a wedge onto sterilized grain (rye, our 5-grain blend, etc.); Golden Oyster colonizes grain in 7–12 days under warm conditions
- Make liquid culture – drop agar wedges into sterile liquid media to produce your own LC
- Expand to more plates – divide one plate into 8–10 fresh plates for a long-term genetic library
- Isolate strong sectors – move the most vigorous growth to a fresh plate to refine your genetics over generations
Shatterproof polypropylene plates
Every Golden Oyster plate ships in a 90mm polypropylene Petri dish rather than the standard polystyrene. Polypropylene flexes under impact instead of cracking — and a cracked plate isn't just damaged, it's a contamination risk, since the crack breaks the parafilm seal. Our Lion's Mane plate is the one exception: it uses clear polystyrene for contrast against black agar.
Specifications
| Specification | Detail |
|---|---|
| Species | Pleurotus citrinopileatus (Golden Oyster, Yellow Oyster, Tamogitake) |
| Genetics | 1st-generation isolate from our master culture |
| Plate | 90mm polypropylene Petri dish, parafilm-sealed |
| Agar | ~18mL standard malt extract agar (MEA) |
| Sterility | Poured and inoculated under HEPA-filtered laminar flow |
| Mycelium appearance | White-to-yellowish, aggressive, fluffy with rhizomorphic edges |
| Colonization speed on agar | Fast — typically 5–8 days at 75–80°F |
| Preferred grain | Rye, our 5-grain blend, or supplemented hardwood |
| Fruiting substrate | Straw, hardwood sawdust, supplemented hardwood pellets, masters mix |
| Fruiting temperature | 65–80°F (warm-weather fruiter — similar to Pink Oyster) |
| Cap color | Bright canary-yellow to golden, fading to pale yellow as fruit matures |
| Fresh shelf life | Short — about 2–4 days refrigerated |
| Difficulty | Beginner-friendly — among the easiest gourmet species to fruit |
| Shelf life (sealed plate) | 60–90 days at 55–70°F; 6–9 months at 35–40°F (refresh every 4–6 months for long-term storage) |
| Ships | Within 1 business day |
Sterility and quality
Every plate is poured, inoculated, and inspected at Myco Labs under HEPA-filtered laminar flow, sealed with parafilm immediately after inoculation, and incubated in a dedicated clean room until fully colonized. Each plate is visually inspected for contamination before it's approved for shipment — if it doesn't look right, it doesn't ship.
Same genetics, other formatsWant the strain ready to inject? The Golden Oyster liquid culture syringe carries the same genetics. Looking for the glossy orange-brown Chestnut mushroom instead? See the Chestnut colonized agar plate.
FAQ
Are Golden Oyster and Yellow Oyster the same mushroom?
Yes — they're the same species, Pleurotus citrinopileatus. "Golden Oyster" and "Yellow Oyster" are used interchangeably, and in Japanese cuisine it's known as tamogitake. It is not the Chestnut mushroom (Pholiota adiposa), a different genus with glossy orange-brown caps.
How does Golden Oyster compare to Blue Oyster and Pink Oyster?
All three are Pleurotus species with similar cultivation requirements. Blue Oyster is the cool-weather option (45–65°F) with a classic mild oyster flavor. Pink Oyster is warm-weather (65–80°F) with a bacon-like flavor when crisped. Golden Oyster is also warm-weather (65–80°F), with a nutty, cashew-like flavor and bright yellow clusters.
Is Golden Oyster a good species for selling at farmers markets?
Yes — the bright yellow color stands out from the brown and white mushrooms typically on display, and the dense clusters look substantial. The main caveat is shelf life: Golden Oyster keeps only about 2–4 days refrigerated, so it's best sold within 24–48 hours of harvest.
How should I cook Golden Oyster mushrooms?
Golden Oyster benefits from dry, high-heat cooking rather than the moist sauté most oysters prefer. Pan-fry in a hot dry skillet until the edges crisp, roast at 425°F until golden, or stir-fry briefly over high heat. Avoid long simmering or braising, which makes the texture mushy.
Can I use this plate to make grain spawn directly?
Yes — that's one of the most common uses. Under a still-air box or laminar flow hood, cut a small wedge (about the size of a pencil eraser) from the colonized plate and drop it into a sterilized grain spawn bag or jar. Golden Oyster typically colonizes grain in 7–12 days at room temperature.
How fast do these ship compared to other agar plate sellers?
Within 1 business day. Most agar plate sellers make plates to order, which can mean waiting 2–4 weeks for a plate to be poured, inoculated, and colonized. Ours are produced on a rolling schedule and held in inventory fully colonized. Multi-item orders may take an additional 1–2 business days so we can pack everything together.
Why do you use polypropylene plates instead of polystyrene?
Polypropylene flexes under impact instead of cracking. A cracked plate isn't just damaged — it's a contamination risk, since the crack breaks the parafilm seal and exposes the culture. Our Lion's Mane plates are the one exception: they use clear polystyrene for maximum contrast against black agar.
How long will the plate stay viable?
An unopened, parafilm-sealed plate stored at 55–70°F in a dark place stays viable for 60–90 days. Refrigerated at 35–40°F, it stays viable for 6–9 months. Golden Oyster is more sensitive to cold than Blue Oyster, so for long-term storage keep plates at the warmer end (40°F) and refresh them every 4–6 months.
What if my plate arrives contaminated or damaged?
We guarantee every plate ships in clean, fully colonized condition. If you receive a contaminated or damaged plate, contact us within 5 days of delivery with a photo and we'll replace it free of charge.
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