1. Clean the concrete garden molds for reusing, spray them with a garden hose.
2. Garden stone molds can be used again right after you pour the first garden stepping stone so you do not have to wait. (Don't wait for it 100% dry, or it will be really hard to remove it.)
3. The thick level of concrete can be varying depends on your requirement of garden stepping stones. A wetter mix of concrete for concrete molds is used to get garden stepping stones with ground / lower level, and a stiffer mix of concrete is used to get garden stepping stones with higher / stone level.