For intensive green roof.
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.
Put 1 inch of soil or a compost soil mix on top of the underlayment system.
Try dry habitat perennials and ornamental grasses such as rudbeckia achillea potentilla armeria dianthus helictotrichon sempervirens stipa tenuissima and even bulbs such as muscari or small allium species such as allium flavum and a.
Their rhizomes can be invasive and may damage waterproofing membranes.
Taking cuttings or sowing seed to grow on and transplant will of course be cheaper still.
Follow the manufacturer s instructions and install it on your roof top.
Purchase an underlayment system from a green roof dealer.
Planting a green roof finally it s time for the plants.
Perfect for a green roof because it adapts well to harsh conditions sea thrift is a grass like plant commonly found on the coast.
It will include a type of moisture barrier layers of insulation filter fabric and drainage protection.
It prefers sandy soil and dry conditions and the plants produce long stems of white or pink flowers throughout the summer.
Shrubs to one metre in height are best used in substrate depths of 250 mm or more.