STS

Braai White Oyster Mushroom Spawn Kit

Original price was: R1,399.Current price is: R995.

✔ Braai White Oyster Mushroom Spawn Kit (Pleurotus ostreatus)
✔ Includes 100 ml Living Inoculant (LI) in a reusable Culture Bottle
✔ Includes 1 kg Sterilized Sorghum Grain Spawn with SHIP & 0.2 µm PTFE filter
✔ STS-selected commercial strain producing large, meaty mushrooms ideal for the braai

Availability: Only 1 left in stock (can be backordered)

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Commercial 100cc Living Inoculant in Septum Bottle + Sterilized Sorghum Grain Spawn w/ SHIP

High-Yield Genetics: The STS “Braai” Clone

The Braai White Oyster (Pleurotus ostreatus) is the flagship oyster mushroom developed and maintained at the Eco Bini Sustainability Testing Station (STS). Selected over many years for vigorous growth and exceptionally large fruiting bodies, this commercial strain produces broad, meaty caps that are ideal for grilling, roasting and high-heat cooking.

Unlike many commercial oyster strains harvested young, the Braai White develops thick, substantial mushrooms with excellent texture and outstanding visual appeal. Its large caps make it equally suited to home cultivation, farmers’ markets and commercial production.

Each Spawn Kit contains everything required to establish your first grain spawn. Once fully colonized, the grain spawn can be expanded into your preferred fruiting substrate for productive harvests.

🌱 Cultivation

Braai White Oyster is one of the fastest and most forgiving gourmet mushrooms to cultivate, making it suitable for both beginners and experienced growers.

Recommended substrates include:

  • Pasteurized wheat or barley straw
  • Master’s Mix (Hardwood Sawdust & Soy Hulls)
  • Supplemented hardwood sawdust
  • Cotton waste
  • Agricultural residues

The strain colonizes rapidly and responds well to high humidity, abundant Fresh Air Exchange (FAE) and indirect lighting during fruiting. Under favourable conditions it produces large clusters of thick, white mushrooms with excellent biological efficiency.

🇿🇦 Why South African Growers Love It

  • Selected by STS for large, meaty mushrooms
  • Fast and aggressive colonization
  • Excellent yields on straw and agricultural waste
  • Thick caps ideal for grilling and braai cooking
  • Reliable performer for home and commercial cultivation
  • Highly adaptable and easy to grow
  • One of the most productive oyster mushrooms in the STS collection

📦 What’s Included

Each Braai White Oyster Spawn Kit contains:

  • 1 × 100 ml Living Inoculant (LI) containing Pleurotus ostreatus
  • Amber laboratory Culture Bottle with reusable 3 mm silicone septum
  • 1 × 1 kg Sterilized Sorghum Grain Spawn
  • Integrated Self-Healing Injection Port (SHIP)
  • 0.2 µm PTFE filter patch
  • 1 × Sterile 5 ml syringe
  • 1 × Sterile 16G needle

🔥 Built for the Braai

This is the mushroom that inspired its name – up to 340gram for single fruiting body.

When allowed to mature, the broad, thick caps hold together beautifully over high heat, making them ideal for grilling with olive oil, herbs and your favourite braai seasoning. Their firm texture and mild flavour make them an excellent meat alternative or a standout side dish on the fire.

Whether you’re growing for the family braai or for commercial sale, this STS strain consistently delivers large, attractive mushrooms with exceptional eating quality.

Detailed instructions are provided in the “How to Use LI” tab.

How to Use LI

🧪 How to Use Your Living Inoculant (LI)

Your Spawn Kit has been designed to make mushroom cultivation as simple and contamination-resistant as possible. The included Living Inoculant (LI) contains an actively growing mushroom mono-culture, while the Sterilized Sorghum Grain Spawn provides the ideal medium for expanding that culture into vigorous grain spawn.

🧼 Step 1 – Sanitize

Before inoculation, wipe both the Culture Bottle septum and the SHIP (Self-Healing Injection Port) on the Spawn Bag with 70% rubbing alcohol.

Allow both surfaces to air dry before proceeding.

💉 Step 2 – Withdraw the Living Inoculant

Using the supplied sterile syringe and needle:

  • Insert the needle through the bottle septum.
  • Withdraw approximately 5 ml (5 cc) of Living Inoculant.
  • Remove any excess air from the syringe.

The Culture Bottle is reusable and can be accessed multiple times using sterile technique, via a 3mm thick silicone septum.

📦 Step 3 – Inoculate the Spawn Bag

Insert the needle through the SHIP on the Spawn Bag and slowly inject the 5 ml of Living Inoculant into the sterilized sorghum grain.

Remove the needle and gently massage the inoculation site if necessary.

The SHIP will reseal automatically after the needle is removed.

🌙 Step 4 – Incubate

Place the Spawn Bag in a clean, dark location at approximately 23–27°C.

Do not expose the bag to direct sunlight.

During incubation, the white mycelium will gradually spread throughout the grain.

🔄 Step 5 – Mix the Grain

Once approximately 30–40% of the grain has colonized with healthy white mycelium, gently break apart the colonized grain and mix it evenly throughout the bag.

This redistributes the growing mycelium and significantly accelerates complete colonization.

🍄 Step 6 – Use as Grain Spawn

Once the grain is fully colonized (completely white), it is ready to inoculate your preferred mushroom substrate.

Suitable substrates include pasteurized straw, hardwood sawdust, Master’s Mix, and other compatible materials depending on the mushroom species.

For best results, use the colonized grain spawn within 3 months.

💡 Tips for Success

  • Work as cleanly as possible during inoculation.
  • Always sanitize the bottle septum and SHIP before each use.
  • Do not remove or damage the filter patch.
  • Healthy mycelium should appear bright white and vigorous.
  • If contamination develops, dispose of the bag without opening it indoors.

♻️ Expanding Your Culture

One of the advantages of the Living Inoculant system is that the Culture Bottle contains enough inoculant to prepare multiple Spawn Bags.

When you’re ready to expand your production, simply order additional Sterilized Sorghum Grain Spawn and repeat the inoculation process using the remaining Living Inoculant.

How to use Living Inoculant (LI)

Weight 1.2 kg
Dimensions 10 × 15 × 25 cm
Culture Type

Mother Spawn, Master Slant, Castellani

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👋 Ed Eco here. Need STS-tested answers on mycology, hydroponics, soil biology or carbon engineering? Ask away...

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Braai White Oyster Mushroom Spawn KitBraai White Oyster Mushroom Spawn Kit
Original price was: R1,399.Current price is: R995.

Availability: Only 1 left in stock (can be backordered)

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