Green Roof Alliums

Nodding onions on a green roof in edmonton canada.

Green roof alliums.

Species could include allium schoenoprasm and cultivars allium cernuum allium senescens and subspecies etc. One of the favourites that we have seen in canada is nodding onion allium cernuum. An allium is a member of the onion family hence the name. Like chives it is also edible.

Plant selection requires careful consideration of site microclimate substrate and maintenance factors linked to the desired aesthetic functional and management outcomes for the project. Another allium that is native to the north america is the prairie onion allium stellatum. Nodding onions are also sometimes referred to as lady s leek. Most herbaceous perennials have limited drought tolerance and the ability to thrive in an extensive vegetative green roof without supplemental irrigation.

Alliums north america. Posted in uncategorized with tags alliums bio tray drainage layer edge restraint extensive green roof filter fabric green roof green roof edging green roof media green roof plants green roof solutions green roof technology green roofs hybrid roof intensive green roof moisture retention roof garden rooftop planters sedums. Foliage colors can vary from green to yellow red and blue and flowers from white yellow and pink to reddish. Two alliums that are useful on green roofs are allium cernuum and allium.

However they should not make up the bulk of the plant mix but rather be used as accents. Aside from chives there are a few native ones in north america that can used. Known for having leaves that look as good as it flowers turkistan onion is among the shorter ornamental allium varieties. It works well when planted in groups in rock gardens border fronts containers and window boxes its pink flower heads are 3 6 inches across held above 3 4 inch wide gray green leaves.

Green roofs are hostile sites. Contains a blend of available allium bare root bulbs from our range of green roof appropriate allium stock. The combination of elevated temperatures wind exposure and high light provide challenging conditions for plant growth. Sedums and other low growing succulents that need little water and can survive in.

Nodding onions on a green roof in edmonton canada. 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. An allium is a member of the onion family hence the name. However some species of alliums dianthus and phlox have shown promise as accent species in some.

It is native across canada and the eastern us.