Cedars out of the water take 2 yrs to drop their needles/foliage. I read ,some years ago, In-fisherman I think, that green cedars give off some kind of acid that keep the fish away. A friend of mine put some cedars in Perry last spring (2010) & we fished over them thru the ice. Never caught anything tho. I put my camera down the hole(12ft to 15ft of water) & the cedars were a dense mass of mossy goo. Kinda looked like a bloated hedge ball, It will be interesting to see what it looks like this winter. Cedar trees with the neddles/foliage gone make some pretty good structure. I have some located that are pasture burnt that I plan on sinking this fall.