Answer: It sounds as though your crepe myrtle is doing very well, even if it is not blooming. They bloom best in full sun which you have for it on the SW corner, they also bloom better if adequately watered. (This would be especially important with a new plant for the first few years.) Pruning is limited to deadheading (if desired) and then trimming off any winter damage in early spring, and possibly shaping if needed, again in early spring. (These bloom on new growth of the season so summer pruning would interfere with flowering.) Based on your description it has grown a lot this year, perhaps it has been overfertilized with nitrogen -- this could happen for instance if you fertilized it in addition to regularly fertilizing an adjacent lawn. This would encourage foliage and vegetative growth at the expense of blooms. Too, it may still bud and bloom for you this summer -- it thrives on heat and humidity and summer is not over yet.
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