Expect to find great deals across Massachusetts with the top discounts ranging from 15% to 42% off the entire store. Stock up on 4/20 for the best discounts, with most dispensaries offering 25% off storewide, according to data collected from Treez, an enterprise cloud commerce platform for retail operations. Treez, analyzed 7500 discounts representing more than $3.5 million in sales to uncover discounting trends and insights during the week of 4/20.