Zelkova tree in my apartment, 08/21/2021 Plants are living things. However, it is said that they are not sentient beeing but places where fairy dwells. Therefore, it provides with a logical reason as foods

 “He knew what she wanted, and he wanted it, too; he was ready, but not, despite her gorgeousness, with Tiglah. Tiglah was not worth losing his ability to touch a unicorn.” ― Madeleine L'Engle, Many