Answer: Check around the base of the plant for signs of the culprit. Look for slugs or their slimy trails as their feeding can be a problem, or for soft-bodied aphids. It may be a fungal leaf spot - they thrive in mild temperatures (50-85F) and humidity. Look also for signs of brown, water soaked tissues, an indication of a secondary decay fungus. It may help to dig up a plant and examine the roots to see if something has been feeding on them. If you find any of these, write us back with a detailed description of the situation and we'll be happy to respond with a solution.
If all proves negative, I'd chock it up to mother nature's strange ways. Some years bring strange things like that, especially with El Nino in the mix! I've notice an unusually pronounced yellowing and drop of older leaves on numerous evergreen shrubs and trees this spring in the south.
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