Green Roof Alliums

Alliums are always a great choice for green roofs.

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. 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. Furthermore there are native allium species across north america and europe including the uk and france. Species could include allium schoenoprasm and cultivars allium cernuum allium senescens and subspecies etc.

Also known as round headed leek this allium species produces cute reddish purple egg shape flower heads. Description contains a blend of available allium bare root bulbs from our range of green roof appropriate allium stock. Please contact us if you are interested in installing this plant as plugs. These roofs are essentially maintenance free.

Foliage may remain green in some locations or in mild winters. Called chives in english it is a widely used herb. Available as bare root bulbs. Foliage colors can vary from green to yellow red and blue and flowers from white yellow and pink to reddish.

Department of agriculture plant hardiness zones 2 through 9 can go without water. 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. In fact allium schoenoprasum one of the most commonly used has a circumpolar distribution. Allium summer beauty creates a visually noticeable vertical accent adding some height to an extensive roof planting while increasing the potential for biodiversity.

Succulents particularly colourful sedums dominate shallow substrate green roofs across temperate europe and north america. Evergreen sedum species especially the vigorous creeping varieties such as sedum album which is hardy in u s. 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. Two alliums that are useful on green roofs are allium cernuum and allium schoenoprasum.