Some fun previous Limited Edition trees have rejoined the FarmVille Market for a very limited amount of time. The farmer-favorite Rainbow Tree and its giant version can be purchased directly via the FarmVille Market using Farm Cash.
FarmVille Limited Edition Trees (Re-released: March 11th 2012)
FarmVille Rainbow Tree (Re-release) – 5 Farm Cash
FarmVille Giant Rainbow Tree (Re-release) – 10 Farm Cash