Coming up
Fri 8.5.2026 at 16:00 -18:00
Helsieni, Veturitallinkuja 5 G, Helsinki
Grow Mushrooms Outdoors workshop: Grow delicious mushrooms in your garden!
Sat 9.5.2026 at 10:00 -12:00
Helsieni, Veturitallinkuja 5 G, Helsinki
Grow Mushrooms Outdoors workshop: Grow delicious mushrooms in your garden!
Thu 21.5.2026 from 15:00 – 19:00
Annala, Hämeentie 154, Helsinki
Helsieni x Annalan Seedling fair: Add mushrooms to your garden!
Sat 23.5.2026 from 10:00 – 15:00
Marketanpuisto, Pehtorinkuja 3, Espoo
Helsieni x Marketanpuiston Spring fair: Add mushrooms to your garden!
Ti 16.6.2026 from 16:00 – 20:00
CoolHead Brew‘s back yard, Koetilantie 1, Viikki, Helsinki
Helsieni x Viikki Local Food Fair: Try our mushroom treats!
Starter Kit
Growkit S
Ready-to-Growkit XL
How to grow oyster mushrooms at home
Fill
Disinfect the kit and scissors. Add the mycelium and fresh coffee grounds. Close the kit.
Add
When coffee is covered in white, add new coffee. Repeat this until the container is full.
Harvest
When mushrooms pushed through the tape, mist mushrooms for 4-7 days. Harvest them by they become the whole cluster.
Mushroom growing is pretty simple!
You only need fresh grounds from your morning coffee and a Helsieni Growkit. The kit includes a growing box, breathable tape and some spawn. If you already have a container suitable for growing the Helsieni Starter Kit is for you. This mushroom is suitable to grow indoors and converts coffee grounds into tasty oyster mushrooms!
Repurposed Containers
Our Growkits are made of repurposed dairy containers from UniCafe restaurants.
Made in Finland
All our products are made in Finland.
Reusable
You can restart your Growkit many times.
Local food!
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Helsieni grows mushrooms at its farm in Karjaa. You can buy our fresh mushrooms through the Uudenmaan ruoka foodhub and in K-Citymarket Ruoholahti, K-Supermarket REDI and Mankkaa. Before selected holidays we also sell via the REKO network in the Helsinki Metropolitan area.
Interested in outdoor mushroom cultivation?
Helsieni also provides everything you need for growing mushrooms outside.
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Our selection includes dowels to inoculate wood logs and stumps. You can choose to grow a variety of mushrooms from the classic shiitake to the extraordinary coral tooth fungus.
The most reliable and easy way to grow mushrooms outdoors is making a mushroom bed. It consists of spent substrate that has already produced oyster mushrooms. You can purchase and pick up spent substrate at the Helsieni office in Helsinki or farm in Karjaa.
Delicious Mushrooms
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Oyster Mushroom (Pleurotus ostreatus)
has a soft and sweet taste and a firm texture. They are naturally high in anti-oxidants, contain lots of minerals and vitamins and contribute to a healthy diet. Explore our recipes and start cooking!