The ultimate goal of the trial is to develop a diverse and extensive list of recommended plants for green roof cul.
Extensive green roof plant list.
Climate clearly plays a major role in choosing the best plants for a green roof.
Careful plant selection and maintenance is needed to ensure annuals do not become weeds on a green roof.
In temperate regions of north america we have recommended natives such as sedum ternatum white flowered sedum a shade lover opuntia humifusa prickly.
While most of the first extensive green roofs in the us were planted with non native succulent species mostly sedum species the plant palette for green roofs in the united states and in minnesota is rapidly expanding to include many herbaceous plants and grasses.
Try dry habitat perennials and.
Semi intensive green roofs require a deeper soil layer but the payoff is in the types of plantings that can be used.
Mat forming species of sedum sempervivum and moss are good choices.
Although sedum species have dominated the plant palette for extensive green roofs there is growing interest in expanding the plant list for extensive green roof systems.
In addition to the mosses grasses and sedum of extensive roofs semi intensive plantings include herbs flowering plants taller grasses and small shrubs.
15 to 50 per square foot.
Bauder sedum blanket xf300 indicative plant list species sedum acre sedum album bella d inverno sedum album coral carpet sedum ewersie sedum kamtschaticum ellacombianum.
Album delosperma could be tried in a sunny frost free area.
Ferns such as polypodium vulgare and asplenium trichomanes could be used in dry shady conditions.
Along with the makeup and depth of the growing medium selecting the right plants is crucial to the success of a green roof.
Some green roofs are constructed specifically to support sports turf.
The bauder green roof vegetation installation guide and the bauder extensive green roof maintenance guide both of which can be found at www bauder co uk.
Common sedum species used include sedum acre s.
The plants chosen must be appropriate for the roof type extensive intensive or semi intensive.
8 to 20 per square foot.
The plant list discussions below pertain to extensive green roofs.
Plants for green roofs.
Green roofs and to trial untested plants for their adaptability to this environment.
Even though the list of native plants for use in extensive green roofs is relatively short there are a few selections that may grow well as native accent plants with occasional irrigation.
These require irrigation and a substrate depth of at least 200 mm.
A 2006 study by the university of michigan comparing costs of conventional and green roofs showed that on average installing a green roof costs about 22 00 sq.
Vegetables are the other main group of annual plants used on green roofs.
