A lot of guys use honeysuckle. very tough, last a long time. I know some who use green cedar. And they kill ducks. Just goes to show color doesn't seem to be important to a duck. I know this sounds crazy, but we are in water waist deep year round, and we have lots of gray colors, so we use kudzu vines as a light layer, as they turn gray they blend in perfect, very tough, and no danger of getting planted in deep water. I hunt in a bottom with lots of buck brush, so I try and blind in with it. also, I ALWAYS try and keep my blind in the shadows for as much of the day as possible, sun at my back.