Green Roof Planting Grasses

On smaller scale green roofs species with excessive vigour such as couch grass cynodon dactylon and kikuyu pennisetum clandestinum should be avoided.

Green roof planting grasses.

For intensive green roof. Put 1 inch of soil or a compost soil mix on top of the underlayment system. Perfect for a green roof because it adapts well to harsh conditions sea thrift is a grass like plant commonly found on the coast. Purchase an underlayment system from a green roof dealer.

Ready to roll carpets of sedum are easiest but you should also be able to find plug trays of sedums and other plants sold specifically for green roofs which will work out cheaper. It prefers sandy soil and dry conditions and the plants produce long stems of white or pink flowers throughout the summer. Taking cuttings or sowing seed to grow on and transplant will of course be cheaper still. Their rhizomes can be invasive and may damage waterproofing membranes.

Shrubs to one metre in height are best used in substrate depths of 250 mm or more. An intensive green roof is a deeper typically greater than six inches heavier system designed to sustain complex landscapes. An extensive green roof is a thin usually less than six inches lightweight system that is typically predominantly planted with succulents drought tolerant ground covering plants and grass. Follow the manufacturer s instructions and install it on your roof top.