You know what plant zone you live in but your plants keep dying even though they are suppose to be hardy. It might be the microclimate. Some microclimates can change an area by half or a full zone. Areas that are windy, face north, are in valley''s or high on hills tend to be colder. Areas that are protected, near buildings or in cities tend to be in warmer zones. You can push plants into a warmer zone by moving it close to a building or into a sheltered...