I think the four most important features to enhance a home's curb appeal actually have nothing to do with landscaping. They are the front door, selecting a front door that mirrors the Architecture of the home. a nice entry light fixture that also is attractive and is consistent with the architecture. A mailbox that is attractive and maybe matches the light in terms of color. and even the address numbers that you can put on your front wall of your house. Those should be attractive and not just some stickers that you get from ACE Hardware or something.