Description
Princess of Pearl Oyster Mushroom Grow Kit
Scientific Name: Pleurotus ostreatus (Princess Pearl strain)
Skill Level: Easy
Growing Time: 7–10 days to first crop
Ideal Fruiting Temp: 12°C–29°C
Fruiting Style: Side Fruiting
Important: Check your fruiting temperature before purchasing and ensure you can provide the temperature this species needs.
About This Kit
1KG
Yield: 300–500g
Our 1 kg kits are premade and ready to go. No waiting, no lead time. If you just don’t want to wait around, this is the one. No fancy box, no unnecessary packaging — just a fresh, ready-to-fruit bag.
3KG
Yield: 900g–1,530g
Our 3 kg kits are made fresh to order. We prepare your bag, wait for it to reach 60–70% colonisation, then send it straight to you. No fancy box, no endless sitting in cold storage.
Lead time applies to 3 kg kits only. The lead time shown above the “Add to Cart” button is the time needed to prepare your order. A product showing as “in stock” means it can be prepared within that lead time, not that it is ready to ship immediately. 1 kg kits ship within our standard handling time when in stock.
What’s Inside
Everything you need is included — just spray water and follow the simple instructions.
Our substrate is a special Master’s Mix: a blend of sawdust and lupin hulls, inoculated with 300g of millet grain spawn to give your mushrooms the best possible start.
Microplastic Free
Soy Allergen Free
Gluten Free
Our bags: We use Unicorn grow bags, made in the USA. Unicorn is the only grow bag in the world independently tested by Eurofins (a third party lab in Europe) and certified to EN 1186 and USFDA 1520 standards for plastic migration into substrate. Tested at 121°C for 3.5 hours. No other PP or PE bag manufacturer has achieved this food safety standard.
About Princess of Pearl Oyster Mushrooms
The Princess of Pearl is a vigorous, high-yielding commercial strain of pearl oyster mushroom. It produces dense, creamy-white clusters with a mild, buttery flavour and tender bite — ideal for sautés, pastas, and soups. This strain is known for exceptional pinset formation, meaning it reliably produces large, dense flushes even in beginner conditions. It colonises quickly and fruits across a broad range of cool to moderate temperatures, making it one of the most versatile and forgiving strains available. Beginner-friendly yet productive enough for small commercial setups.
Shelf life: Once fully colonised, the block can be stored in the fridge for up to one month if you are not ready to fruit it straight away. Do not refrigerate until the bag is fully colonised (completely white).
Growing Conditions
Humidity: 85–90%. Mist 2–3 times daily to keep the cut surface moist.
Light: Indirect light helps cap development — avoid direct sunlight.
Air: Gentle fresh air exchange to prevent long stems and small caps.
Temperature: 12°C–29°C fruiting. Colonisation ideally at 21–24°C.
More Than One Harvest?
Yes. Expect 2–3 flushes. After each harvest, remove all remaining fruit bodies, allow the block to rest 3–4 days, then soak in cold water for 2–3 hours before resuming misting.
Common Mistakes to Avoid
Low humidity: Leads to aborted pins and cracked caps — keep the cut surface moist at all times.
High CO₂: Causes long stems and tiny caps — increase gentle airflow.
Direct sun or heat: Dries the block and deforms caps — use indirect light only.
What if pins form inside the bag?
Don’t worry. Ignore the internal pins. Gently fold the top of the bag to push out excess air, cut a small X in the side of the bag where you want the mushrooms to grow, and begin misting that spot daily. The internal pins will be naturally aborted as they don’t have space to grow.
💡 Keep humidity steady and ensure gentle airflow. Princess of Pearl will reward you with dense canopies and repeat flushes.
⚠️ Spore Warning
All mushrooms produce spores as part of their natural growth cycle. Some people may be sensitive or allergic to spores, so be mindful of where you grow them. Harvesting earlier — as the caps begin to flatten — will help you avoid heavy sporulation.
Download your full step-by-step growing instructions from the link above. We recommend saving these before your kit arrives so you are ready to go.
This kit introduces you to Stage 3: Fruiting — the final step in mushroom growing. To explore all three stages (from spores to harvest), check out our Educational Mushroom Growing Kit.
Checkout all our Spray and grow kits.
Checkout out our fine Misting Spray Bottle to produce tiny droplets and keep humidity high. The size of droplets formed can easily be evaporated , this constant evaporation signals mycelium to pin.
Could not fruit the bag, or was it contaminated? Send us a photo or call us, and we will help you resolve the issue
