Plants, just like animals, can also feel stressed, and the effects on their produce are significant. 

I eat almost exclusively organic food, and I can tell the difference between a banana grown in organic but STRESSFUL environments vs an organically grown banana in the middle of the jungle. 

Some common stressful environments are mass plantations, or near a road, or maybe even cell towers.

The chill banana has deep vanilla notes, almost like ice-cream, while the stressful banana tastes made in china.