Scoring the poppies doesn't give the best results IME , just harvest them and do a freeze-tek extraction on them and process them into smokeable opium.
The procedure looks as follow, boil the poppies down into tea (big pieces or whole so less chlorophyll and plant fats get extracted) , let it cool down and strain through a t-shirt , then fill 2l soda bottles about 3/4 with your tea , let them freeze 2/3 through , drain the resulting (dark brown)liquid into a pan ( discard the ice left in the bottle it contains all your plant fats) and evaporate the resulting syrup into smokeable opium.