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* 300 mm to support turf grass (and accept only rainwater/roof runoff)
* 300 mm to support turf grass (and accept only rainwater/roof runoff)
* 600 mm to support shrubs, flowering [[perennials]] and deep-rooting decorative [[grasses]]
* 600 mm to support shrubs, flowering [[perennials]] and deeply rooting decorative [[grasses]]
* 1000 mm to support [[trees]]
* 1000 mm to support [[trees]]
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