I'm in the desert so what works here may not for you.
They leave the rosemary alone and the Mexican Heather too. The ivy looking thing on the ground is fine. Eventually they'll leave the Red Bird of Paradise alone except near the bottom but it gets big. I saw the male sampling the artichoke so we'll see what shape it's in this morning.
It's trial and error. The Red Bird of Paradise, my chickens LOVE it and the quail too but it gets rather large so they won't be able to wipe it out if I can keep it alive long enough. Rosemary and thyme are strongly aromatic so they usually leave those alone, marjoram is another.
Another thing you might try is greens in one of those suet cages. I have one for the chickens and one for the quail. I stuff them with curly mustard, cilantro, dill, kale, parsley and they eat that stuff like crazy.
I also give them squash and they LOVE cucumber but won't eat broccoli.
Also, keep in mind there were only 14 quail in there and I'm down to 6 now.