Living wall specialist Biotecture is to build a 180sq m green wall with a jigsaw of multicoloured plants as part of a bid to deal with pollution hotspots in London.
Around 14,000 plants will be clustered on giant panels for the wall, which will be built on a busy main road by Edgware Road tube station in north London.
Biotecture will be helping to test the effectiveness of green walls for pollution mitigation by monitoring the amounts of particulate matter accumulated by different species.
The wall is due to be installed in a month's time and will include evergreens and other perennials. They include Lavandula 'Munstead', Erysimum 'Bowles's Mauve', Geranium mac, Stachys byzantina 'Silver Carpet', Carex testacea and Heuchera 'Plum Pudding'.
The project includes installation and upkeep for three years.
Transport chiefs and London mayor Boris Johnson want to reduce levels of PM10, a pollutant coming mostly from traffic emissions, by up to a fifth.
Transport for London (TFL) said air-quality modelling showed most of London met European limits for average PM10. However, there were some local hot spots.
Chief operating officer Garrett Emmerson said: "Work to increase the green infrastructure will rapidly increase as planting for the green wall gets underway."
Johnson said: "Our assault on pollution continues apace. Improving quality of life and greening the capital go hand-in-hand."
The clean-air initiative will also see 500 trees planted on nearby streets and 50 2m-high planted towers, said the Department for Transport, which is funding the project.
Other dust-suppressant trials will include more walls, screens, trees and shrubs.
Green wall Plants
- Acorus gramineus 'Ogon'
- Euonymus 'Emerald Gaiety'
- Euonymus 'Emerald 'n' Gold'
- Euphorbia characias 'Humpty Dumpty'
- Hypericum calycinum
- Lonicera nitida 'Maigrun'
- Veronica 'Waterperry Blue'
- Vinca minor 'La Grave'
- Waldsteinia ternata.