Question 1

What are the best grasses and herbaceous plants for green roofs in the UK?

Accepted Answer

Some of the best grasses and herbaceous plants for green roofs in the UK include Sedum species, Festuca ovina (sheep's fescue), and various wildflowers like Achillea millefolium (yarrow) and Leucanthemum vulgare (oxeye daisy). These plants are well-suited to the UK climate and can thrive in the unique conditions of a green roof.

Question 2

How do succulent plants contribute to drought resistance on green roofs?

Accepted Answer

Succulent plants, such as Sedum and Sempervivum, have specialized tissues that store water, allowing them to survive prolonged dry periods. Their ability to retain moisture makes them ideal for green roofs, especially in the changing weather patterns of the UK.

Question 3

What are the aesthetic benefits of using herbaceous plants on green roofs?

Accepted Answer

Herbaceous plants not only provide greenery but also add colour and texture to green roofs, enhancing their visual appeal. They can also attract pollinators like bees and butterflies, contributing to urban biodiversity.

Question 4

Why are hardy ground covers recommended for green roofs?

Accepted Answer

Hardy ground covers, such as Thymus serpyllum (creeping thyme) and Armeria maritima (sea thrift), are recommended for green roofs because they have spreading characteristics that help stabilise the substrate, prevent erosion, and create a lush, green surface.

Question 5

How do green roofs benefit water retention in urban areas?

Accepted Answer

Green roofs help manage rainwater by absorbing and retaining it, reducing runoff and the risk of flooding. The plants and growing medium can hold significant amounts of water, which can then be released slowly, benefiting the surrounding environment and improving drainage in urban settings.

Taylor Roofs Edinburgh