Most chickens have a sixth sense about these things; an instinctual knowing of what they can eat and what to avoid. I would take some time to observe your flock, bc like everything there can be exceptions. Watch and see what they do - pecking at it is one thing, and ingesting a little out of curiosity is fine. You want to make sure they’re not chowing down on these plants. Most likely instinct will tell them no (my chickens eat the whole apple except for the seeds, so I’ve witnessed this sixth sense in action), but it’s best to observe.
I’m curious, though... how are you going to keep a nice garden with chickens roaming through it? They will eat all the flowers before the fruits and veggies get a chance to grow.... plus they will scratch in it and possibly damage plants and roots??