A canopy sheet material for use over growing plants such as grape or berry or other fruit vines has higher water permeability in a longitudinally extending substantially centre lengthwise part (33) than in lengthwise side parts (34). In use rain falling on the canopy runs down the side parts (34) and drains through the centre part (33) to approximately the centre of each tree or vine which keeps water away from the fruit under the less water permeable side parts (34).
