About this 3kg Kit

Complete Kit: Everything you need is included, just spray water and follow the simple instructions.

This kit uses a special Master’s Mix, a blend of sawdust, soy pellets, and water. It’s inoculated with about 300 grams of  rye or millet grain spawn to give your mushrooms the best start.

We keep things simple and affordable by sending you a fresh, made-to-order bag, just like real mushroom farms use. No fancy boxes, no sitting in cold storage for weeks. This helps keep your cost down by $10; we pass that saving directly to you. We call these kits ‘almost ready to fruit’.When the block is completely white, put it into fruiting conditions.

King Oyster mushrooms (Pleurotus eryngii) are known for their thick, meaty stems and large caps, which give them a rich, savory flavor that chefs love. They grow best when temperatures stay cool and steady, with humidity carefully controlled. Unlike other oyster mushrooms that grow in clusters, King Oysters form individually as tall “trumpet” shapes or crowns, often producing very large mushrooms.

The mycelium (the “roots” of the mushroom) colonises well at normal room temperatures (22–24 °C), but to make the mushrooms fruit, you need a cooler range of about 15–20 °C. Because they grow from the top of the block rather than in bunches, each block usually gives only one substantial harvests.You can try for second harvest with poor luck.

Humidity: Keep ~85–95% RH during pinning, then 80–90% as fruits expand.
Light: Indirect light is sufficient — avoid direct sun.
Air: Good fresh-air exchange (FAE) is important; If Co2 is increased, you get smaller cap, that is the look we want to achieve as the stem is what we chase with King oysters. That is why when you top fruit, leave a bit of plastic on about 5 cm from the substrate.
Storage: Keep colonised blocks refrigerated if you need to delay fruiting; harvested mushrooms are best used fresh or dried or freeze dried.

Step 1 – Let It Grow

*Take the bag out of its packaging.
*Stand it upright letting the mycelium breath from the white filter and do not cut it yet.

*Please keep it away from direct sunlight, windows, fans, AC, or a wardrobe.

Note: Full colonisation for king oyster blocks can take longer (2–4 weeks) depending on  temperature — wait until the block is solidly white before inducing fruiting.

Need to Wait?
If you’re not ready to start fruiting after full colonisation, you can store the bag in the fridge for up to a month. Do not store it in the fridge until the bag is fully colonised(white).

Step 2 – Fruiting & Harvest

Once fully colonised(grown white), induce fruiting:

1. Initiate Pinning:
To trigger mushroom pinning, reduce the temperature to between 15–20°C. Also, increase fresh air exchange (FAE) to signal the mycelium that it’s time to fruit.

Preparing the Bag for Top Fruiting:
Since this is a top-fruiting setup, you won’t be cutting slits or X’s on the sides of the bag like with side-fruiting methods. Instead, you’ll cut the top of the bag open to expose the surface of the substrate.

Here’s how:

• First, locate where the substrate ends inside the bag.

• From the top of the bag, make a straight cut all the way around—but stop about 5 cm above the substrate, leaving a ring of plastic around the top edge.

• This creates a “reservoir” for-retaining  co2. This extra co2 is what helps us achieve the classic look of  King oyster with long thick meaty stem and small cap, its the stem that we are after for king oysters.

Maintaining Humidity:
It’s critical that the surface of the substrate stays moist. Mushrooms won’t form if the substrate dries out. Aim to keep a layer of tiny water droplets on the surface at all times—this indicates proper humidity. Avoid over-spraying, as excessive water can cause contamination or hinder pin development. Since we are exposing the whole top area of the substrate, it also means more surface area for evaporation and chance of substrate surface drying out, this is why the kit is rated as Intermediate level.

2. Mist: Maintain humidity and mist the exposed surface 1–3 times daily as needed —Do not spray on baby mushroom when they form, there should only be tiny droplets of water at every time, not more. Do not let the surface dry otherwise it wont fruit.

3.Harvest: Mushrooms typically appear in 7–10 days. Harvest when caps are starting to curl upwards, exposing their gills., twisting gently at the base.

Flushes: blocks will give you one solid flush. Soaking between flushes can help recover moisture and will give you another smaller flush.