The Helsieni Growkit contains everything you need to start growing mushrooms on your coffee.
How to make your own Mushroom Growkit
If you have purchased the Helsieni Starter kit, you need to make a growing container, or “Growkit”. Below we show you how to do it:
We recommend to make about 1 hole / 1,5 liter. As a general rule, you get more mushrooms the bigger your container is.
Restarting your Growkit
After you had 2 or 3 batches of fresh oyster mushrooms, your kit will not produce mushrooms. Take the whole substrate out of your Growkit and put it onto a clean plate. Select a good-looking 20% and cut it into pieces. Clean your Growkit, close the holes with breathing tape (available from your local pharmacy), then sterilize it. Put the cut substrate in the box with a bit of water. Wait for 2 days for the mycelium to start growing again. Now you can start feeding it again with coffee! You can put the remaining 80% of the substrate in the compost or organic waste. You can even leave it in some humid corner of your garden, it might still produce some mushrooms!
What our customers are growing
Frequently Asked Questions
When you are adding coffee to the Growkit the mycelium grows and spreads. The ideal temperature for the Grey Oyster is at 24°C. Room temperature is just fine. In this phase the mushroom does not require light.
When the Growkit is full, you wait for mushrooms to fruit. The optimal temperature at this point is 10-20°C. If you do not have a cool place at home, you can trigger the fruiting phase by putting the Growkit in the fridge for 1 or 2 days. In this phase your mushrooms need a bit of light and humidity. Spray them with water if needed.
You can put the remaining 80% of the substrate in the compost or organic waste. You can even leave it in some humid corner of your garden, it might still produce some mushrooms!
If the whole substrate is too contaminated or dried out, you can order a new Starter Kit from our webshop.
Contamination can happen if you do not wash your kit before starting it, if you handle it with dirty hands, if the substrate is too dry… or simply if some mold spores (they are everywhere) win the battle towards your lovely grey oysters!
If there is contamination in your Growkit, take it out with a clean spoon. Keep a daily eye inside the box and take the mold out every time it grows back. Make sure the substrate is always humid. If however the substrate turns completely green, throw everything away, clean the box with alcohol and order a new bag of spawn at our webshop.
- If the box is not full, you have waited too long before adding more coffee grounds. Take all growing mushrooms away and add fresh coffee grounds.
- If you had stopped filling the box, you did it too early. Take all growing mushrooms away, fill the box completely with fresh coffee grounds and be ready to take the tape off in few days.