How to choose plants for narrow borders. Choisya ternata, Euonymus japonicus 'Green Spire', Euonymus fortunei 'Emerald Gaiety' and Hedera colchica 'Gloire de Marengo', Digitalis lutea, Penstemon 'Raven', Verbascum 'Jackie in the Pink',Perovskia 'Blue Spire'
