start with the camera icon and don't try and upload too large a photo
when you say transplanted, do you mean dug up and moved or planted a container grown plant?
I see a nice plantain on the right, broad leaves, probably the one you refer to. A weed
I'm a bit suspicious of the grassy looking one, middle left, as well
I cut mine anytime when the leaves are off.
poppies can be tricky, I find they do best from an autumn sowing.
my garden is far from enclosed, near Peterborough uk
deer have rubbed bark on some trees here. Muntjac at low level and Roe deer higher up. Are they in your area? They seem to choose particular trees and keep at them, others untouched. I've left the damaged ones, I thought if I removed those the deer would choose more.
Parts of this plant may struggle on for a while but I fear it's dying
I think they're like rabbits wakeshine, always at it