Green Roof Alliums

However some species of alliums dianthus and phlox have shown promise as accent species in some.

Green roof alliums.

Nodding onions on a green roof in edmonton canada. Green roofs are hostile sites. One of the favourites that we have seen in canada is nodding onion allium cernuum. Nodding onions are also sometimes referred to as lady s leek.

Sedums and other low growing succulents that need little water and can survive in. Two alliums that are useful on green roofs are allium cernuum and allium. Alliums have no serious insect problems as the sulfur compounds they produce apparently help ward off insect pests. 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.

Aside from chives there are a few native ones in north america that can used. 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. An allium is a member of the onion family hence the name. Alliums north america.

Plant selection requires careful consideration of site microclimate substrate and maintenance factors linked to the desired aesthetic functional and management outcomes for the project. Contains a blend of available allium bare root bulbs from our range of green roof appropriate allium stock. It is native across canada and the eastern us. Species could include allium schoenoprasm and cultivars allium cernuum allium senescens and subspecies etc.

Known for having leaves that look as good as it flowers turkistan onion is among the shorter ornamental allium varieties. However they should not make up the bulk of the plant mix but rather be used as accents. Root rot may be a problem in waterlogged growing media but poor drainage should never be a problem on a properly designed and installed green roof. The combination of elevated temperatures wind exposure and high light provide challenging conditions for plant growth.

Foliage colors can vary from green to yellow red and blue and flowers from white yellow and pink to reddish. 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. Another allium that is native to the north america is the prairie onion allium stellatum. Nodding onions on a green roof in edmonton canada.

Like chives it is also edible.