The problem is that if these people are voting for Jill Stein, then they are not actually voting for who they wish. Jill Stein is not the person who they think she is.
If she were to magically win the election, they'd by-and-large be extraordinarily disappointed in the result.
This is why misinformation and disinformation is so destructive in a democracy. The voters need to be properly informed.
One idea is to look at what kinds of weeds want to grow there, and plant desirable plants that look similar to the weeds.