Answer: Monrovia's Plant Information says their particular varieties bloom best in full sun. One of my other references says spiderworts can grow in sun or shade. Many plants will have a range in which they will perform. Spiderwort blooms open only for one day, and indeed the extra heat reflected from the driveway may be an issue. Spiderworts reproduce readily and usually need division every 2-3 years, so you can try some in another location to see how they perform. Good luck!
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