All gingers, normal, turmeric, black ginger and all the rest of it. Passionfruit grows well from seed, anything citrus, vegetable, fern, tons of bananas, especially plantain, gynura, both varieties chaya, sauropus androgynus, all sorts of sweet potato, cassava, lemon grass. At the beginning I would stick some annuals under the trees. Also Brazil spinach, gotu kola, all sorts of taro, they look great. One of the nicest teas is the root of mondia whitei, if she doesn't want produce but tea.