Attention: RotterZwam hit by fire - Read more RotterZwam believes in a society that closes loops, uses raw materials to the max of it's potential and produces food localy. 

That's why we grow super fresh mushrooms on the coffee grounds of the city of Rotterdam and sell them to staurants and supermarkets in the 010-area code.

With 6 awards we are Europe most decorated urban farmers!

Start your own farm?

Read all on our master program 
to start your own farm

Collect coffee at your company?

Want us to collect the coffee from your company? 
Join our program

Grow at home?

Become a kitchen farmer and grow fresh
mushrooms on your own coffee grounds

Buy fresh oyster mushrooms?

Do you own a restaurant in 010? Are you from Rotterdam and do you want to purchase fresh oyster mushrooms?


Our mission for the the coffee grounds
being wasted in our society

Get a dose of inspiration?

Do a tour through our farm.
Or book us as speaker on your venue.


kg mushrooms produced 


coffee grounds safed from incineration


kitchen farmers


entrepreneurs trained in master program