- For bowls and vases, the preferred time to turn is when the wood is “green” (soon after harvesting, same day is ideal) and “rough” turned. Rough turned items are turned to the approximate shape of the finished product and then left to dry as slowly as possible for about a year before the item can be finish turned. This is typical in bowl turning, and the wall thickness is left at about 10% of the diameter until dry. The drying process in our location in central Alberta (very dry climate) needs to be slowed by storing the wet rough turned pieces in paper bags or wrapped in newspaper. Vases, if turned at an optimal 3/32” of an inch thickness, will dry much faster. If turned at a consistent wall thickness, the vases should not crack in the drying process.