The harebell, [bluebell in Scotland], is a classic green roof plant. It is common on roofs on continental Europe and can be found on roofs in Canada, and the UK.
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It can be found at ground level in varied dry habitats such as short grassland, heaths, dunes and cliffs. This makes it suitable for green roofs, brown roofs and brown roofs, especially ones that are designed to attract wildlife.The delicate flowers look like nodding bells and can be seen throughout the summer.
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This is important as they provide a good nectar source over a long period for a range of native bees, including Wool-carder, Red mason and Honey Bees. White-tailed, Common carder, Red-tailed and Buff-tailed Bumblebees are also regular visitors to collect nectar and polen from the flowers.