Hi, We need suggestions for fast-growing shade trees with an emphasis on hardiness. This tree will be in an urban landscape (Washington, DC) about 15-20 ft max from our house, eventually overhanging the neighbor's yard. We need shade, would like it to be faster growing, but don't want wimpy trees that will split or fall over in our tropical thunderstorms or winter ice storms. Suggestions I've received for fast growing include Naches Crepe Myrtle, Weeping Linden, River Birch, Sawtooth Oak, Red Maple. Can anyone speak to the strength of those trees, or to their appropriateness for zone 7, likely to be even hotter and drier over the coming years? ; ( If you have another suggestion appropriate for our zone, that would be appreciated too, with comments about its strength and speed doubly welcome.