Okay upon Further Investigation I did pull up the fruitType and as of the most recent updates (9.0 of Wampsville and newer) which have already disabled the AI planting of Clover and Alfalfa (pulled from Fruit updates from Gnadenthal so I didn't realize it was already done) This being said, are you running a new save since 9.0? If not this would be part of the problem of why its still giving the missions. If so i would like to know so i can try to dig in further as to why it is still happening on new saves if the game is being told not to let AI plant them.