Mushroom Grow Kit – Shimofuri (Black Pearl / Marbled) (Pleurotus Ostreatus) – Made to order

Description

Shimofuri (Black Pearl / Marbled) Ready-to-Fruit Mushroom Kit Guide

Shimofuri (Pleurotus ostreatus)—also known as the Black Pearl or Marbled Oyster—is a phenomenal hybrid of the King Oyster and the Blue Oyster. Extremely popular among chefs, this strain produces dense, meaty stems and large, beautiful caps. Because of its unique genetics, it requires cooler temperatures and a very stable humidity to produce those top-tier culinary fruits.

For a visual walkthrough of setting up your kit, check out our guide here: https://www.youtube.com/watch?v=Es5p2EaDkyg

🛠️ Getting Started: The First Flush

• Step 1: Prep the Box – Remove the perforated cut-out from the front of your kit box to expose the bag inside.

• Step 2: Score the Bag – Using a sterilised knife (wiped with isopropyl alcohol or heated with a flame), cut an “X” into the plastic mushroom bag. Make the “X” roughly the same size as the hole in the box.

• Step 3: Keep it Humid – Mist (give it a light spritz) 1 to 3 times per day with filtered or cooled boiled water. Crucial tip: Only spray the outside of the plastic flaps to create humidity; don’t spray the substrate block directly!

🌤️ Ideal Growing Environment

• Temperature: Shimofuri love the chill! Aim for a stable, cool room temperature between 10-16°C to fruit successfully. If it gets too warm, they will struggle to form properly.

• Stable Humidity: Keep it high and stable, ideally over 80%. Fluctuations in humidity can stall this particular hybrid.

• Fresh Air (Oxygen): Mushrooms breathe oxygen just like we do! They need plenty of fresh air to develop properly. Do not lock them in a dark, confined space or cupboard; if they can’t breathe or have restricted airflow, they will become very “leggy” (long stems) with tiny, underdeveloped caps.

• Light: Mushrooms need enough light to read a book by. This helps them orient themselves and develop a healthy pigment.

🍄 Tips & Troubleshooting

• Patience is Key: While standard Oysters are speed demons, this hybrid can sometimes take just a little more time to form those dense, meaty stems. Keep a close eye on them once they start pinning!

• Watch the watering: Once your mushrooms actually start forming (fruiting), avoid misting the fruits directly to prevent blotch or rotting.

• Stalled growth? If your mushrooms suddenly stop growing, your room may have spiked in temperature or dropped in humidity. Shimofuri are especially sensitive to sudden changes.

• Fruiting in the wrong spot? If you notice mushrooms trying to fruit underneath the plastic instead of out of your “X” cut, your room is too dry. The mushrooms are seeking the trapped moisture.

🔪 Harvesting Because of these great genetics, expect roughly 300-700g per harvest, depending on your environment!

• When to pick: The best time to harvest is when the edges of the caps are still curled slightly downward. As soon as the caps start to roll outward and upward, the mushroom is about to drop its spores. You want to harvest just before this happens.

• How to pick: Harvest the whole cluster at once by gently twisting the mushroom away from the block.

• Clean up: Make sure you remove all leftover bits of mushroom flesh from the block so nothing is left behind to spoil.

♻️ Preparing for Later Flushes

• Rest Period: After your first harvest, let the block rest for 2 to 3 weeks before you start misting it with water again. Later flushes always take a little longer to come through!

• Rehydrating: If your block feels really light after that first flush and rest period, it needs a good drink.

  1. Remove the block from the box.

  2. Submerge the bag in cold water for 5-12 hours to rehydrate it.

  3. The next day, tip out any excess water.

  4. Put the bag back into the box, but face it the other way (so the old “X” is at the back).

  5. Cut a brand new “X” on this fresh side and resume misting!

Happy growing!

Please note this culture is sold with our Mushroom Spawn and Cultures sale agreement. By purchasing you agree to this agreement