Very variable, but a great and some would say essential addition to a green roof. We use both the wild and culinary varieties on our roofs. They make it through most droughts and can hang on in soils from 60mm deep. We really like the wild version as it varies in habit often with quite curly grey/green leaves. It’s also more compact and tougher if walked over (Dusty take note!). As with virtually all the plants we use on our roofs, it’s great for bees and other pollinators. It’s a green roof plant that’s naturally happy on shallow soils over rock – pretty much your average green roof conditions!
