Green Roof Alliums

These roofs are essentially maintenance free.

Green roof alliums.

Other common green roof plants include ice plant delospermum sp hens and chicks sempervivum sp creeping thyme thymus serphyllum chives and ornamental onions allium sp phloxes phlox sp pussytoes anntenaria sp thrift armeria sp and false rock cress aubretia sp. Also known as round headed leek this allium species produces cute reddish purple egg shape flower heads. Succulents particularly colourful sedums dominate shallow substrate green roofs across temperate europe and north america. Both have performed admirably in studies conducted at michigan state university.

Please contact us if you are interested in installing this plant as plugs. Species could include allium schoenoprasm and cultivars allium cernuum allium senescens and subspecies etc. Foliage may remain green in some locations or in mild winters. Various low growing 6 10 tall alliums can be used for accent and they typically have green or bluish foliage and flowers of white pink or purple.

Evergreen sedum species especially the vigorous creeping varieties such as sedum album which is hardy in u s. Department of agriculture plant hardiness zones 2 through 9 can go without water. Their low growing and or spreading habits great drought tolerance seasonal flowers and contrasting foliage colours textures and forms make them ideal candidates for green roofs. Alliums are always a great choice for green roofs.

Called chives in english it is a widely used herb. Furthermore there are native allium species across north america and europe including the uk and france. What are called extensive green roofs are usually planted with low growing plants heat and drought resistant species such as sedums or grasses such as allium. Please contact us if you are interested in installing this mix as plugs.

Each flower head comprises a tight cluster of tiny florets that emerge deep green but mature top to bottom to rose purple. In fact allium schoenoprasum one of the most commonly used has a circumpolar distribution. Foliage colors can vary from green to yellow red and blue and flowers from white yellow and pink to reddish. Allium summer beauty creates a visually noticeable vertical accent adding some height to an extensive roof planting while increasing the potential for biodiversity.