We’ve seen a lot of rooftop gardens but how do they do it? Wanna create your own rooftop oasis? Then these ideas from gardenmatter.com will help you! Let’s start from drainage layers: so, the first layer is roof, then a waterproof barrier, then drainage, filtration, growing medium and vegetation. Investigate the maximum structural load capacity of the roof and consult a structural engineer. Make sure you have a good idea of the daily and seasonal sun exposure and shade variations. If a large building block the sun, choose more shade-tolerant plants. Extremely windy areas can dry out the plants or break the stem systems before they mature, so keep reading what to do in the source.