Answer: Based on your description I would suspect that hot dry weather is causing it to die back and go dormant. This is a very tough plant, so although it may not die due to heat and drought, it does suffer. Another possibility is that there is a fungus or disease problem which appears in hot humid weather, again not enough to kill it. If you suspect this, you might take a sample to your county extension (858-0885) for a diagnosis and suggested remedy.
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