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The Mushroom Lab

Everything you need to grow your own Princess Pearl Oyster mushrooms in as little as 4 weeks.

Everything you need to grow your own Princess Pearl Oyster mushrooms in as little as 4 weeks.

Grow fresh, delicious Princess Pearl Oyster mushrooms at home with a beginner-friendly kit that does the hard work for you. Your grow bag arrives pre-sterilised and ready to use, so there is no messy prep, no specialist equipment and no experience needed. Simply inject the included Princess Pearl Oyster liquid culture, allow the bag to colonise, then follow the fruiting steps to grow your own fresh gourmet mushrooms.

✔️ Pre-sterilised Princess Pearl Oyster bag

✔️ Simple injection port, no messy prep

✔️ Harvest fresh mushrooms in around 4 weeks

  • Sterility Guarantee
  • Free & Fast UK Delivery
  • Beginner Friendly
£29.95 GBP £19.95 Sale

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  • Inoculate

    Inject the included Princess Pearl Oyster liquid culture into the pre-sterilised grow bag through the self-healing injection port.

  • Incubate

    Keep the inoculated bag somewhere clean and warm while the mycelium spreads through the grain and substrate.

  • Fruiting

    Once colonised, start fruiting by cutting slits in the bag as directed, allow fresh air exchange and light misting until pins and mushrooms develop.

Get Multiple Harvests From One Block

After your first flush, rehydrate the block and return it to fruiting conditions. With a little care, it can keep producing fresh Princess Pearl Oyster mushrooms, giving you more from every grow.


Typically 500–800g of fresh Princess Pearl Oyster Mushrooms from one kit over multiple flushes, with up to 1kg+ possible in ideal conditions.

Why Grow Princess Pearl Oyster Mushrooms?

Princess Pearl Oysters are a reliable gourmet variety that produces dense clusters of soft pearl-grey to creamy-white caps, pale stems and delicate gills.

They have a tender, meaty bite with a mild savoury flavour that works brilliantly in everyday cooking. Princess Pearl is a vigorous Pleurotus ostreatus strain known for dense flushes and adaptable fruiting conditions.

  • Tender, Meaty Texture

    Their tender but satisfying texture makes them ideal for pan-frying, roasting or tearing into smaller pieces for stir-fries and pasta dishes.

  • Brilliant For Cooking

    Princess Pearl Oysters have a mild savoury flavour that works beautifully in pasta, risotto, ramen, soups, tacos, stir-fries and crispy fried mushroom dishes.

  • Beautiful Pearl-Grey Clusters

    Princess Pearl Oysters grow into elegant layered clusters with soft grey, creamy and pale silver tones. They look just as impressive growing from the bag as they do on the plate.

What's Included With Your Order

  • Pre-sterilised Grow Bag
  • 10ml Liquid Culture Syringe
  • Sterile Needle & Alcohol Swab
  • Clear Step-By-Step Growing Instructions
  • A Classic Gourmet Oyster

    Princess Pearl Oysters are a great introduction to gourmet mushroom growing. They are beginner-friendly, attractive to grow and easy to use in everyday meals.

  • Reliable, Dense Flushes

    This variety is known for producing full, layered clusters when given the right conditions, making it a rewarding kit for first-time growers.

  • Mild Flavour, Endless Uses

    Their gentle savoury flavour does not overpower a dish, so they work well with simple ingredients like butter, garlic, herbs, soy sauce, cream sauces and noodles.

Built for Reliable Gourmet Mushroom Growth

Why does this kit have a high success rate?

✔️ Injection port to reduce contamination risk

✔️ Pre-sterilised grow bag

✔️ Easy process from start to finish

✔️ Proven substrate combination used by growers

  • Sterile & Ready to Use

    No pressure cooker. No complicated lab setup. Injection port and filter patch help maintain clean airflow while you grow.

  • Fast UK Shipping

    Orders before 2pm are usually shipped same day from our UK lab with Royal Mail 24 or 48 hour tracked shipping.

  • Great For Beginners

    Designed with simplicity in mind, this kit follows a clear, step-by-step process to help reduce contamination risk.

Frequently Asked Questions

Is this kit suitable for complete beginners?

Yes. The bag arrives pre-sterilised and ready to inoculate, so you do not need a pressure cooker, specialist equipment or previous mushroom-growing experience.

What exactly is included?

Each kit includes a pre-sterilised all-in-one grow bag, a 10ml Princess Pearl Oyster liquid culture syringe, sterile needle, alcohol swab and clear step-by-step instructions.

Do I need any extra equipment?

You only need a clean area to inoculate the bag, a suitable place for colonisation and a spray bottle for the fruiting stage. Everything else is included.

How long until I can harvest Princess Pearl Oyster mushrooms?

Most growers can expect their first harvest in around 4–6 weeks from inoculation, depending on temperature and growing conditions.

What temperature does Princess Pearl Oyster need?

During colonisation, keep the bag somewhere clean and comfortably warm, ideally around 21–24°C.

Once fully colonised, Princess Pearl Oysters can fruit across a broad temperature range, but a bright room around 16–22°C is a great target for steady growth. Maintain indirect light, humidity and plenty of fresh air.

Can I grow this in my kitchen, bedroom or flat?

Yes. A bright kitchen, spare room, utility room or sheltered indoor space can work well. Keep the bag out of direct sunlight and make sure it receives fresh air during fruiting.

What do I need to do after the bag arrives?

Keep the bag sealed until you are ready to inoculate. Wipe the injection port with the alcohol swab, inject the included liquid culture, then place the bag somewhere clean and suitable while the mycelium grows through the substrate.

How will I know when it is ready to fruit?

The bag is ready once the substrate has turned mostly white with healthy mycelium. At that point, follow the included instructions to cut the fruiting area, move it to cooler conditions and begin misting.

Why are my mushrooms growing with long stems or small caps?

This usually means they need more fresh air. Increase airflow around the fruiting area while keeping the mushrooms lightly misted.

Can I get more than one harvest?

Yes. Your first flush is usually the largest, but the block can often produce additional smaller flushes. After harvesting, rehydrate the block and return it to fruiting conditions.

How much will I grow?

Yields vary depending on temperature, humidity, fresh air and care. Your first flush is usually the largest, with further smaller harvests possible from the same block.

What do Princess Pearl Oyster mushrooms taste like?

Princess Pearl Oysters have a mild savoury flavour and tender, meaty texture. They are especially good pan-fried until golden, then added to pasta, risotto, ramen, stir-fries, soups or tacos.

Why does this kit use a liquid culture syringe?

Liquid culture gives you a simple way to start growing without needing to prepare grain spawn yourself. The syringe injects directly through the bag’s self-healing injection port, helping keep the process clean and straightforward.