Follow the manufacturer s instructions and install it on your roof top.
Green roof planting grasses.
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.
Purchase an underlayment system from a green roof dealer.
Their rhizomes can be invasive and may damage waterproofing membranes.
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 will include a type of moisture barrier layers of insulation filter fabric and drainage protection.
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.
On smaller scale green roofs species with excessive vigour such as couch grass cynodon dactylon and kikuyu pennisetum clandestinum should be avoided.
Shrubs to one metre in height are best used in substrate depths of 250 mm or more.
Taking cuttings or sowing seed to grow on and transplant will of course be cheaper still.
For intensive green roof.
It prefers sandy soil and dry conditions and the plants produce long stems of white or pink flowers throughout the summer.