Green Roof Alliums

Foliage colors can vary from green to yellow red and blue and flowers from white yellow and pink to reddish.

Green roof alliums.

Department of agriculture plant hardiness zones 2 through 9 can go without water. Alliums are always a great choice for green roofs. 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. Both have performed admirably in studies conducted at michigan state university.

Please contact us if you are interested in installing this plant as plugs. Called chives in english it is a widely used herb. Allium summer beauty creates a visually noticeable vertical accent adding some height to an extensive roof planting while increasing the potential for biodiversity. Furthermore there are native allium species across north america and europe including the uk and france.

Description contains a blend of available allium bare root bulbs from our range of green roof appropriate allium stock. 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. Evergreen sedum species especially the vigorous creeping varieties such as sedum album which is hardy in u s. Also known as round headed leek this allium species produces cute reddish purple egg shape flower heads.

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

These roofs are essentially maintenance free. Each flower head comprises a tight cluster of tiny florets that emerge deep green but mature top to bottom to rose purple. Foliage may remain green in some locations or in mild winters. Please contact us if you are interested in installing this mix as plugs.