SummaryMany green decorative branches (“greens”), which form an important part of ornamental bouquets, originatefrom shade plants, and are commercially grown in Israel under black shade nets. We are studying the possibility to manipulate the nature of the vegetative growth of greens to improve the yield and quality desirable for various ornamental crops.The present paper summarizes the results obtained for Pittosporum variegatum grown under shade nets of various optical properties: green, red, blue, grey, black, and reflective. The knitting density and design of the nets were adjusted to give the same transmittance of sunlight in the PAR (photosynthetically active radiation, 400–700.nm) region. The experiments were carried out in a commercial plot. A single layer of 50% shade net covered the plot during thewinter season, and two layers in the summer, according to common practice. Data were collected mostly during the second growth year. The main results obtained included: (i) pronounced stimulation of bra...