Herbs at a Glance. Plant terrarium basics. Madrid's Green Wall is Flourishing as is the Caixa Forum. Photo: B. Alter Madrid's green wall is a veteran... First noted here in 2008, it was designed by Patrick Blanc, who has created some of the most famous vertical gardens in Europe. Urban Gardening: Indoor and Balcony Gardening Tips. Posted on Nov 19, 2010 in DIY Projects , Emergency Preparedness & Survival , Urban Gardening, Farming & Homesteading It’s quite feasible to grow your own food even if you live in an urban space and have no outdoor room to garden. If you have just a bit of space on a balcony, patio or rooftop, you can grow even more.