Balkonschule

In the page's words:

The Berlin Balcony School

serves individuals and businesses as a demonstration garden for training sessions, lectures, and workshops on self-sufficiency, sustainable and animal-friendly gardening to promote biodiversity in small spaces, as well as a showcase for vertical gardening, climate terraces, and worm composting. The motto: Every meter counts! My Biotope on the Balcony. A nature experience and the joy of harvesting right in the middle of the city. A place to experiment, observe, and learn through hands-on gardening.

• Ecological gardening in pots, tubs, and balcony planters
• Vertical gardening of fruits, lettuces, vegetables, and herbs 
• Climate terrace for overheated (roof) terraces
• Edible wild plants
• Insect-friendly gardening
• Worm composting of your own organic waste
• Library on container gardening
• For Businesses, SMEs, and Teams: “Green Social Day,” Company Outings, Team-Building & Educational Afternoons (Team Hiking Day), Christmas Party