If you live in an area where neighbors don't use pesticides + weedkiller you can find some healthy plants that are good for your beardie in your own yard. Most people know that dandelions are good, both leaves and the yellow flower. Another yellow plant you might have is the blossoms from the forsythia bush. And another healthy choice is green leaf clover . This is what forsythia bush looks like.
https://www.google.com/aclk?sa=l&ai=DChcSEwiZj8j5l9DoAhWNr8gKHZo7A64YABAKGgJxdQ&sig=AOD64_3Y_kMPYZsqZM4VoP-jIWNTc9Anow&ctype=5&q=&ved=2ahUKEwi3_7_5l9DoAhXKZs0KHZPvCkoQ9aACegQIGRB6&adurl=
https://www.google.com/aclk?sa=l&ai=DChcSEwiZj8j5l9DoAhWNr8gKHZo7A64YABAKGgJxdQ&sig=AOD64_3Y_kMPYZsqZM4VoP-jIWNTc9Anow&ctype=5&q=&ved=2ahUKEwi3_7_5l9DoAhXKZs0KHZPvCkoQ9aACegQIGRB6&adurl=