Answer: Trumpet Honeysuckle thrives in full sun to part-day shade, and I have seen some old lilacs blooming in partial shade. Clethra requires full sun, and lilac will bloom more profusely in sun than even light shade. In your hot, sunny climate, though, they may perform better in part shade. Here are a few suggestions for other light-shade-tolerant perennials that attract butterflies: Joe-Pye Weeds (Eupatorium sp.), Heliotrope (Heliotropium arborescens), Japanese privet (Ligustrum japonicum), many mints, and Bee Balm (Monarda). Hope this helps!
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