Jude suggests gluing shade cloth to greenhouse vents. How about white water-based paint, the cheapest latex you can find? Easier and it comes off quickly for winter and spring when you need as much light as possible. Robin Hansen _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>