Your weed might be v. safe and high quality, but what about less conscientious growers?
Home growers who are not selling any of their product should be exempt.
My state is just dealing with the issue of whether dairy producers can sell raw milk and cheese to the public. The raw milk folks lost. Obviously the producers can use the raw milk products - they just can't sell the public. It should be the same for cannabis.
Pine
No it should be the exact opposite for both weed and dairy. As you mentioned the RAW MILK people lost. The government at the point of a gun has once again interfered with free people WITHOUT any possible harm coming to a third party. Again the government is immoral, not the woman who wants to buy fresh unpasteurized milk, or the farmer willing to produce it.
Land of the Free?
As for the less contentious farmers if they poison you sue them, quit buying their product, and prosecute them for fraud IF they sold their goods fraudulently (i.e. pesticide free, but really loaded with DDT).