M.P.
Oleanders are poisonous - but very pretty - I wanted to plant them as well in my back yard. My husband and I planted a dwarf crepe in the back with some mexican heather around it. They are small green flowering plants with little purple flowers. They are super low maintenance and if you trim them back in the winter, they will come back in the spring. Phlox is also a pretty flowering, low maintenance plant. The fountain grasses add a lot of texture and are low maintenance, however, some get to over 6' tall so you have to watch which ones you select. If you do this, you may enjoy the back yard so much you spend more time outside and will gravitate towards tending your flowers. It is such a stress reliever for me and I love it! Also, if you have a smaller spot, pots are great as well. There is a pottery place in McKinney that sells huge pots and if there is a crack in them, you can buy them for less than $10! I have a subscription to Back Yard Living Magazine and they always have tons of ideas for container gardens. The sky is the limit with flowers though!
Good luck!!!!!
m*