I bring mine to forage on weeds in the spring, summer, and fall. They mostly eat dandelion, plantain, and clover but will occasionally nibble some grasses.
I grew grass in the enclosure for my yellow foot and it was a waste my yellow foot had no interested in it what so ever actually just took up space she wouldn't even go in that corner. never planted it when I moved her in to her new set up and i'm currently in the process of building an even bigger enclosure XD