Here in South Florida we have pigeon peas and Sesbania grandiflora (vegetable hummingbird), White yams, Papaya, many tropical fruit trees like white sapote, jackfruit, cocoplum, natal plum, wild coffee, coffee arabica, cacao and many others that grow wonderfully from seed. Also great self seeders, ageratum (deters root knot nematodes), gaillardia (carefree native flower).... if anyone is interested in growing in zone 10 let me know and i can help with selection.