The growing medium depth for an extensive green roof system is typically 6 inches or less.
Extensive green roof plants.
Extensive green roofs have a growing depth of 3 to 6 inches and are typ ically lighter in weight with a saturated weight of 15 to 30 pounds per square foot.
2 inch drainage and 3 inch fll certified growing media.
River rouge assembly plant.
Succulents such as sedum are often chosen for extensive green roofs because they withstand harsh conditions and minimize water loss.
At the ford motor co.
Plants for extensive green roofs should have low growth height rapid growth spreading and fibrous roots that have high drought tolerance.
Because of the challenges of selecting plants for shallow media this publication focuses on extensive green roofs.
Vegetables are the other main group of annual plants used on green roofs.
As the nation s leading supplier of plants for green roof systems since 1998 our accomplished horticulture team has more experience than any other nursery in the united states growing plants for successful green roof projects.
Founded the first green roof nursery in north america.
Plants for extensive green roofs.
Extensive green roof an extensive green roof system is characterized of its vegetation ranging from sedums to small grasses herbs and flowering herbaceous plants which need little maintenance and no permanent irrigation system.
Succulents these are exceptional plants to consider and they are used to cover an important area of green roofs.
Small succulents are low maintenance plants.
Plant diversity is the key for long term sustainability reduced maintenance and enhanced green roof benefits.
A 10 4 acre extensive green roof in dearborn mich.
Green roofs are classi cally described by the depth of the growing medium extensive semi intensive and intensive.
The planting medium in extensive green roofs ranges from 1 6 to 6 inches deep and while deeper systems have been installed they are not favored as much as the shallower systems drought tolerant sedums succulent plants and grasses are the typical plants used since they are shallow rooted and use little water plant diversity on these roofs is kept low to simplify care and to be sure all plants have similar moisture requirements.
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.
Careful plant selection and maintenance is needed to ensure annuals do not become weeds on a green roof.
Plants for an extensive green roof here is a list of 10 of the best plants in various categories that you can use.
Green roof plants this is an example of tolerable plants to create diverse extensive green roof habits e g.
They grow with little soil and practically no water.
By contrast extensive green roofs use shallower media depths less than 6 inches and require minimal maintenance.
