Mushroom Grow Box - King Oyster Mushrooms

You're looking for a new fresh ingredient to grow for the next big cook up...

​

King Oyster mushrooms contain compounds that researchers have been studying specifically in relation to cholesterol metabolism and cardiovascular health. They're also the most versatile mushroom in the kitchen: that thick, dense stem holds up to roasting, slicing, and high-heat cooking in a way no other variety does. Once you grow your first batch, you'll wonder how your kitchen managed without them.

​

What you'll taste: Slice the stems into rounds, pan-sear in butter until golden — and you've made mushroom scallops.

​

First mushrooms in 10–18 days. First flush guaranteed.

1. Find a shelf/counter inside to grow your mushroom boxes. Avoid direct sun and wind to prevent water from escaping your box.

2. Cut an X on the front of your box. This will trigger the mycelium to get ready to grow mushrooms. (Within 1-30 days).

3. Maintain a suitable environment for your mushrooms. They like shade, fresh air, and humidity.

4. Use a spray bottle to lightly spray them to keep them happy. (Don't drench them).

5. A humidifier helps them thrive on auto pilot.

6. Once they fan out fully, twist and pull them off right away. Leaving them too long will let them drop spores and decay. (This can happen within 24 hours).

We recommend storing your boxes in a cool, dark spot for no longer than 3 months before using them. They can withstand storage for up to 6 months in the fridge but fresh is always best.

No. Just water in a spray bottle and a spot with indirect light. Optional: our mushroom grow tent speeds up growth.

The first flush is guaranteed. Additional flushes depend on two critical factors: (1) harvesting before spores drop, and (2) maintaining ideal humidity, temperature, and air flow. Many growers get 2-3 flushes, but we only guarantee the first.

Harvest when caps flatten but BEFORE the edges curl up and release spores.

5-7 Days in the fridge in a breathable container (paper bag). We recommend cooking within 2-3 days for peak flavour.

Absolutely! It's a popular school science project. Adult supervision recommended for the cutting step.

Add it to your garden—it's excellent compost! Wild mushrooms may even grow in your yard later.