Wilderness Regrowth with Towny

Is it possible to use the towny plugin for bukkit for minecraft to regrow "wilderness" areas?​

I'm hoping to allow blocks that are commonly harvested, like sand, to regrow over time so the landscape isn't destroyed by people harvesting sand for glass (as an example). I know you can do this with creeper explosions, so if there is a way to do this for player destruction then please let me know.​