The Helsieni Urban Mushroom Farm

Every year around the world millions of tonnes of  coffee waste are sent to the incinerator or landfill. Coffee grounds, however, are an excellent source of nutrients and perfect for growing mushrooms. The coffee making process sterilizes the grounds and if used fresh they don’t require additional treatment. Helsieni grows oyster mushrooms on Helsinki’s coffee waste and aims to be part of the city’s sustainable food ecosystem. The Helsieni Urban Mushroom farm currently consists of two ex-Reefer shipping containers. Our current location is Martinkyläntie 43, Vantaa.

We have built and designed the farm for sporeless oyster mushroom  (Pleurotus Ostreatus) production. The total output capacity is around 200kg of mushrooms per month. Oyster mushrooms require very little water and energy to grow and because they are rich in proteins and amino-acids they are very healthy.

If you are interested in buying our oyster mushrooms, please send a message to or call +358 466165597.

What our customers say

Helsieni’s mushrooms bring to mind many things: always fresh, they store well and most importantly: delicious. I admire the passion of the growers, which is reflected in the quality. – Henri Alén, Ultima Restaurant

REKO Farmer’s Markets

When we have a surplus of mushrooms we attend the following REKO farmer’s markets:

An unforgettable team building experience?

Spend a great day with your friends, arrange a team building session with colleagues or celebrate a special day with family by learning how to grow mushrooms on coffee grounds! For group workshops we can come to your desired location on a time that suits your schedule. If you are interested in participating in a workshop with a group, please contact us at!

Custom Program

Helsieni offers tailored programs to suit your needs for a journey into the world of mushrooms:

  • A guided tour of our farm.
  • Discovering the fabulous world of mushrooms
  • Fill-Your-Own Mushroom Growkit
  • Tasting of our mushrooms

Our offers

The Classic Tour | 1h – A guided tour of our farm.
The Discover Package | 1,5h – A guided tour of our farm and presentation about the cultivation of mushrooms. Also we will explain about other inspiring mushroom applications. Every participant will get a Helsieni Starter Kit to take home.
The Do-It-Yourself Package | 2h – A presentation about mushroom biology and a hands-on workshop where each participant fills their own Growkit, which they can take home.


Download our brochure to discover our offers and build your own customized program!


For more information please contact us at

Contact us

Spent substrate

Spent mushroom substrate is the waste product of every mushroom farm and severely undervalued. We produce about 150 kg a week of this stuff, and we need to dispose of it because keeping it near our farm increases the risk of contamination. However, you can still use it for many purposes, the most important one: growing mushrooms in your garden! We think spent mushroom substrate is the best mulch ever.

The benefits of using spent mushroom substrate are:

  • You can get fresh mushrooms within 2-3 weeks!
  • Great for mulching your plants.
  • Naturally degrades within 1 year and serves as a slow release fertilizer, rich in N and P.
  • Helps build a healthy population of micro-organisms and worms in your soil.

You can come by anytime and pick up as much as you want. If you would like to have some delivered, please get in touch!