Lamium orvalaLamium orvala This is a rare and showy giant form of the popular ground cover grows very differently compared with its other known cultivars. Lamium orvala has upright growth to 50cm high which emerge in late winter from a winter dormancy of the underground crown of this hardy perennial plant. large showy dusky magenta shell blooms at the top of the stems in spring. the best place to plant this truly beautiful plant is in part shade to an open light