Even if I will harvest some or a bit, depends...this far I have done actually from pods. I remove the seeds and everything excessive, powder the pods with blender and boil with a good amount of water, filter through cotton, evaporate and when thicky coating forms on the surface, remove it. I continue this till something like 1/10 of liquid is left, put a little bit ethanol and to cool place and next day I always made another round. When I had about three of those I put it all together and precipitation to secondary and started to evaporate the liquid again as before, removing the coating as it forms, all the way to opium. Then I mix it with some ethanol so that I have about 1/3 amount of liquid from the last one. Next, in few days a lot of precipitation forms to be removed to secondary again. I take the clear ethanol opium solution and evaporate it to more pure opium. Then I mix this high quality opium or some of it with good amount of alkaline water and adjust ph to 9 and collect very pure precipitation, morphine. Next I rise ph to at least 11 and collect precipitation again, other alkaloids. When I adjusted ph back to 9 no more precipitated. Last time this simple method worked very well. Very little further procession is needed, not even non-polar solvents. Both precipitations worked when smoked with herbs.
About the molds, only minority are dangerous anyway when eated or drinked. So that would be option also. I just got so pure looking end product that I couldn't resist to try IV my first time and didn't get any harm, only from my shooting technique (thick skin and vein walls).