Thanks for helping me!
Funny: 2 newspapers later and I have 50 popcorns in stock
I think I found a little glitch which might be helpful for people going for the green thumb. (At least it is new to me) It also gives some easy xp, but then again not that much.
When you open the newspaper, always go for people selling fruits, chances are, they just harvested and some bushes need reviving, nothing new about that. You find a farm and help bushes there. Then you open the paper again and go to another farm, then open the paper and go back to the first farm, the revived bushes are jumping again. IMPORTANT: it looks like going back to your own farm inbetween makes the glitch stop.
Since I already have the green thumbs achievement, I don't know if he is counting all those clicks as unique reviving, but I checked for the xp and you get new xp for every bush you help. For collecting xp it is only worth it when the whole farm needs reviving, but for scoring green thumbs it might speed up the hunt