Mix wood ashes and burnt refuse with the soil. Thujopsis Delabrata, Thujopsis Borealis (of taller growth), Irish Yews, Cupressus Lawsoniana Erecta Viridis, Thujas Orientalis, Vervaeneana, Semperaurescens, Standard Rhododendrons, Standard and Pyramid Hollies, Yucca Gloriosa (a ideal picture), Yucca Recurva (the best hardy plant for vases). The Cercis tree is also well adapted for lawns.