Green Roof Alliums

Evergreen sedum species especially the vigorous creeping varieties such as sedum album which is hardy in u s.

Green roof alliums.

Called chives in english it is a widely used herb. Succulents particularly colourful sedums dominate shallow substrate green roofs across temperate europe and north america. 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. Species could include allium schoenoprasm and cultivars allium cernuum allium senescens and subspecies etc.

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. Allium summer beauty creates a visually noticeable vertical accent adding some height to an extensive roof planting while increasing the potential for biodiversity. Available as bare root bulbs. Both have performed admirably in studies conducted at michigan state university.

Two alliums that are useful on green roofs are allium cernuum and allium schoenoprasum. 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. In fact allium schoenoprasum one of the most commonly used has a circumpolar distribution.

Alliums are always a great choice for green roofs. Description contains a blend of available allium bare root bulbs from our range of green roof appropriate allium stock. These roofs are essentially maintenance free. Please contact us if you are interested in installing this mix as plugs.

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. Foliage may remain green in some locations or in mild winters. Each flower head comprises a tight cluster of tiny florets that emerge deep green but mature top to bottom to rose purple. Also known as round headed leek this allium species produces cute reddish purple egg shape flower heads.