Tl;dr the enemy will walk toward the spot they first saw you by walking straight until they intercept a diagonal, then follow the diagonal to you. Once they are tracking you, they will follow you so at that point you would need to lose them to try again.
Step on it. For harmful plants, you can throw something (e.g. food ration) on it do “pop” the plant first, or lead an enemy onto it
I never figured out how to trick an enemy into walking onto a plant
Tl;dr the enemy will walk toward the spot they first saw you by walking straight until they intercept a diagonal, then follow the diagonal to you. Once they are tracking you, they will follow you so at that point you would need to lose them to try again.