Careful plant selection and maintenance is needed to ensure annuals do not become weeds on a green roof.
Herbs extensive green roof plant list.
Some green roofs are constructed specifically to support sports turf.
Types of green roofs.
15 to 50 per square foot.
These require irrigation and a substrate depth of at least 200 mm.
Salt tolerance of common green roof and green wall plants.
Green roofs and to trial untested plants for their adaptability to this environment.
Many of the most common culinary herbs happen to grow in dry rocky places making them ideal candidates for a green roof.
Fol lowing an initial five year evaluation phase new trials of uncommon and or untested plants will continually cycle into the green roof gardens.
This list features a selection of plants that are available in many parts of the country.
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.
When choosing plants for a green roof they need to be able to withstand wind and frost be drought resistant tolerate living in poor soil and be maintenance free.
Of course there is some cross over between the categories.
For a conventional roof.
Climate clearly plays a major role in choosing the best plants for a green roof.
Intensive parks and gardens including urban agriculture semi intensive garden green roofs extensive natural low maintenance green roofs blue gr.
Plants for green roofs.
Green roofs are internationally placed in three different types.
8 to 20 per square foot.
It is not meant to be a complete list.
The ultimate goal of the trial is to develop a diverse and extensive list of recommended plants for green roof cul.
This is where a living roof crosses over to become an herb garden.
Common sedum species used include sedum acre s.
Try dry habitat perennials and.
The plants chosen must be appropriate for the roof type extensive intensive or semi intensive.
Mat forming species of sedum sempervivum and moss are good choices.
An extensive green roof has a soil depth of three to six inches.
Many other sedum species can also perform well.
Album delosperma could be tried in a sunny frost free area.
Vegetables are the other main group of annual plants used on green roofs.
Ferns such as polypodium vulgare and asplenium trichomanes could be used in dry shady conditions.
With all this in mind here are ten of the best green roof plants to choose from.
The list below shows some of the most common species.
Non native succulent species appropriate for extensive green roofs in minnesota.