Answer: If you've seen them in your neighborhood, then they should grow well for you. Hydrangea blooms on new wood that develops on old wood so you'll want to choose a variety such as Endless Summer. Endless Summer blooms on both old and new wood so if the plant freezes down to the ground each winter, it will still flower for you. Plant hydrangeas in amended soil so it will drain well, yet hold moisture. Morning sun and afternoon shade is best for this plant.
Clematis likes its roots in a cool, shady area and its tops in full sunshine. Again, amend the soil with compost or aged manure so it's light and loose. Either shade the bottom of the plant by planted behind a shrub or set a decorative rock in front of the plant to shade the roots.
Magnolia won't be quite as easy to grow in your area. The roots are shallow and therefore subject to freezing. However, you can try adding 4-5" of mulch over the roots during the winter time.
Hope this information helps!
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