I'm new to cold hardy tropicals in my zone 6a microclimate (we're 5b in the country.) I'm always looking for new plants to kill. :) The surprising survivors include dioscorea oppositifolia, ponciris trifoliata, jasminum x stephanense, phyllostachys aureosulcatus, rhapidophyllum hystrix, lagerstroemia indica "Red Rocket", datura metel, musa basjoo, gelsemium sempervirens "Margarita", albizia julibrissin, and paulownia tomentosa.