Tree House Craft Cannabis — with locations in Dracut and Pepperell — is hoping its program will spread across Massachusetts. The child safety standards in cannabis packaging require extra layers of plastic to make them more difficult to open. Tree House Craft Cannabis — with two dispensaries in Massachusetts — has a strategy to redeem, recycle and, in some cases even reuse the plastic packaging. “This benefits everyone in the industry," said Wes Ritchie, co-owner…