The light condition is a very important restricted factor to the vertical greening under the viaduct of Shanghai inner circle .The light condition under the viaduct is fairly poor .In many sections, the light ratio is only about 4.6% and the light intensity is below 1 000 lx or even below 500 lx , which is under the light compensation point of shadeplant .In such condition , experimental plant such as Parthenocissus tricuspidatus, P . laetevirens, Trachelospermum jasmonoides cv . Variegatum and Euonymus fortunei , all grow very slowly .Comparatively , P .quinquefolia shows good adaptation to the light condition and grows rapidly , the annual growth amount is up to 3～ 6 meters, so it is an ideal plant for the vertical greening of the columns of the Inner Circle V iaduct.