Abstract
This study investigated the possibility of using woodchips as a substrate for a green roof on a five-story building in Matsudo, Chiba University. Three kinds of substrate were used; woodchips, garden compost and a mixture of the two. Vegetables (Brassica rapa var. peruviridis, Brassica rapa var. chinensis, Lactuca sativa var. crispa) and forbs (Viola×williamsii, Matthiola incana, Brassica oleracea) were grown in a container of each substrate. The results showed that the plant growth in woodchips was good as that in horticultural compost and woodchips can be used as a lightweight and environmental friendly green roof substrate.
