6 Liter Mycelliumblock

Breeding set oyster mushroom!

Dear Pilzwerk Friend,

thank you very much for purchasing our mushroom breeding set for your home. We wish you great joy with your own mushroom cultivation and of course bon appetit when eating your mushrooms. Stay healthy.

The Pilzwerkteam





1.Trigger the fruit by piercing about 10 new small holes in the substrate bag. Place the bag in a cool place at 4-10°C for 1-2 days.

2.During the fruiting phase, leave the bag at about 12-16°C without direct sunlight and moisten it 2-3 times a day with a few squirts of water from a spray bottle.

3. Harvest the oyster mushrooms by grabbing the mushroom grape or the single mushroom with both hands, turn it to the side and pull it towards you.

4. Leave the substrate bag to rest for 1-2 weeks at about 20°C in a shady place and spray the bag with a little water from time to time.

5. To re-expose the fruit go back to step 1



What is a Mycelium Block?

Fungi are wondrous organisms that only slowly reveal all their secrets to us humans. However, we can grow some mushrooms ourselves, bring them to fruition and enjoy all the gastronomic and health benefits at home. For a better understanding you should know that the actual mushroom consists of a combination of many mushroom strands, the hyphae, and is called the mycelium. The mycelium is usually hidden invisibly in the ground or in the infested trees. What we humans then call the fungus is the fruiting body, which serves for reproduction. In the hats of the fruit-bodies, there are fungus-spores, that are carried on by the wind, insects or animals in the nature. As long as the living space, the substrate for the fungus, still holds enough nutrients, the mycelium will bring fruits again and again to multiply.

What you are now holding in your hands is straw strewn with mycelium and some treats that we have provided for the fungus to live longer. We have, so to speak, provided the mycelium with a suitable living space and allowed it to grow to the stage where the first fruits could now appear. This is a streaky mycelium block (substrate block).

Why do mushrooms begin to fructify?

In nature, the mycelium of most mushrooms grows best in the summer months, whether in the soil or other suitable environments. It always depends on the type of mushroom, which living space it prefers. In nature, the oyster mushroom grows on trees or fallen branches and is a wood decomposer. The champingnon mushroom, for example, grows in the ground and decomposes what is left of the oyster mushrooms and similar fungi and is therefore a so-called composter mushroom. With both types of mushrooms, however, fruit only comes to you when the life parameters change. Usually it is the drop in temperature in autumn, extensive rainy days, or both. The mushrooms adjust to the autumn and the following winter and start fruiting.

If we want to get the mushroom to fructify itself, we have to imitate exactly what happens in nature with the seasons: changes in temperature and humidity. If the parameters change, the fungus changes its metabolism and begins to form fruiting bodies. In this phase it is important that the environment is humid enough, because a lot of water is needed for the formation of the fruit.

Why do I have to poke new holes in the Breeding Set?

It is very important to know that mushrooms, just like humans, breathe and therefore need oxygen for life. When we seed the mycelium in the breeding set bag, we are already pricking some holes in the bag so the fungus can breathe. Through exactly these holes the oyster mushroom would also form its fruits, because here the oxygen content in the environment of the Mushrooms is the highest. If we pierce new holes in the mycelium block from time to time, the mushroom realizes that air can also be drawn from other parts of its living space. The mushroom puts ist metabolism in such a way that the necessary oxygen is transported from these new airlocks into the interior of the mycelium block. The mycelium becomes stronger. So, if we keep adding new holes, we keep the mycelium block fit and urge it to grow further. This is also the reason why the mycelium block is not necessarily kept in a locked box. Through respiration, the fungus itself produces a lot of carbon dioxide and if fresh air is not added, it suffocates.


You can probably imagine that there is no light in the ground or in a tree stump, i.e. where the mycelium spreads out. And it is at this stage that the fungi doesnt really need any light at all. However, when the fruits begins to grow, mushrooms also need some light, because this is how colour pigments are formed and the mushrooms get their colouring.

Light is also very important for the formation of some vitamins, such as vitamin D. We humans can only produce this through sunlight (UV light). Since fungi are not plants and therefore do not carry out photosynthesis, they do not need as much light as plants. A shady place without direct sunlight is enough for the fruits to get enough light and develop all the important substances that we can then eat. Direct sunlight can even cause the fruits to dry out.

If the fruits are exposed to strong winds, they dry out. So you don’t need a fan to add enough air to the mushroom. The area where you place the mushroom block should still get some fresh air at least once a day. Just open a window for a few minutes in the room where your mushroom block is. In most cases this is enough to ensure that you get healthy fruit.


Our substrate is designed so that it can bear fruit several times in a row. We harvest 4 to 5 times, sometimes even more, until the substrate is completely exploited. At some point the necessary nutrients are no longer available and the fungus no longer yields any fruit. One can still use the mycelium, however, because for other Mushrooms or plants there are still enough nutrients. Crush the mycelium block and spread it in your garden in the soil, your plants will enjoy additional fertilization. Or dispose of the mycelium in your compost.

If you want to know what we can conjure up from our Oyster mushrooms, have a look at our PRODUCT PAGE. You can find out where we are with our Foodtruck on Instagram, Facebook or on our homepage.