Answer: There are many different kinds of weeping cherries and some species and cultivars will be more hardy than others. (Color is not the determining factor in hardiness.) Your zip code places you in zone 6B which is quite suitable for flowering cherries in terms of winter weather. In your area, you would want to select a planting site in full sun with average to rich soil that is well drained, meaning not sopping wet or saturated with standing water after a rain. Protection from winter wind can also be helpful. Be sure you have ample space for the mature width of the tree plus a bit more for air circulation.
Cherries tend to have a spreading and aggressive root system so you should plan on having it surrounded by lawn with mulch directly beneath it. Use an organic mulch year round, this helps feed the soil as it breaks down slowly over time. It also helps keep down weeds and helps keep the soil cool and moist in summer. Do not mound it or allow the mulch to touch the trunk or bark; apply it in a flat layer.
Both color and mature size are determined by the specific species and variety you plant. Your local professional nursery staff should be able to show you a selection. I hope this helps.
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