Is there a rule of thumb on how long a tree can be down and still be suitable for turning bowls and platters? I live on 7 acres on woods (plus access to dozens more) and have several large trees that have come down in storms in the last few years and would like to use them if that is doable. Is it as simple as just cutting into them and if they aren't rotting then they are good to go? I know for sure that one of them has only been down for less than a year so I assume that it would be ok but I don't know about the others. I'd hate to fell a big tree if I don't have to. Any advise would be appreciated -- thanks!