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What can you grow on a green roof?

This topic contains 4 replies, has 5 voices, and was last updated by Profile photo of Kiki Cuyler Kiki Cuyler 2 years, 11 months ago.

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  • #3993
    Profile photo of Kathleen
    Kathleen
    Keymaster

    I know the soil depth is pretty shallow, but is there anything you can grow on a green roof? I assume most stuff that you could grow in a pot you could also grow on a green roof.

    #3994
    Profile photo of Thomas buuu
    Thomas buuu
    Participant

    It largely depends on the strength of the roof. The stronger the better, although this would mean sacrificing profitable areas of any large development, and as each tower can only support a set amount of weight, I think the developers would rather the weight was spent on an extra inhabitable floor than a great green roof (unfortunately). On a smaller building, I think you’re looking mainly at flowers and pleasantries. What excites me the most is the thought of larger buildings that can support more weight going ahead and planting crops and even trees. That would be great.

    #3995
    Profile photo of Melissa Smart
    Melissa Smart
    Participant

    I don’t think we’ll see much of that for a very long time. For now, I think green roofs will be more limited to pleasantries, as you say.

    #3996
    Profile photo of Jenny Curry
    Jenny Curry
    Participant

    I’m not sure if soil depth is the main issue, but wouldn’t roots potentially damage the underlying roof? It really depends on just how deep the soil is to be able to say what you could grow.

    #3997
    Profile photo of Kiki Cuyler
    Kiki Cuyler
    Participant

    The roofs must be designed with roots in mind, I’d imagine. There is probably a coating of some kind of hard, smooth surface underneath that is hard to crack and doesn’t provide an entry points for water (freeze/thaw) or roots.

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