Hawthorne Dying From Inside Out

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I have Indian Hawthorne hedges growing on both sides of my driveway facing the street. One side has just started dying from about six feet from the driveway and outward on either side. Half the hedge is now gone, and, I need advice before I replant. My bathroom drains both flow into the pipe that runs under the center of the problem, but, having had a blockage cleared between the access point and the street main, I no there is no blockage. Any ideas?
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Ash - Housewares

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Posted 7 years ago

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Spencer, Official Rep

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Official Response
Indian hawthorn is generally a very tough plant with few problems. It is drought tolerant but decidedly less tolerant of wet conditions.

Generally established Indian hawthorn should not be watered more than once a week in hot, dry weather and less often during the winter. Is there any possibility that the sewer line under the planting leaks significantly? You may want to dig down into the soil in couple of areas to see if the soil is waterlogged. Indian hawthorn growing in wet conditions often has sparse foliage with many red leaves and may have more fungal leaf spot disease problems. When you dig into the soil, also take a look at the roots. Healthy roots will be firm and fleshy while roots suffering from root rot diseases will be dark and mushy.

A heavy infestation of scale insects could also result in the plants declining. Scales can be found on leaves and/or branches and are usually visible with the naked eye. More information on scale insects can be found here: http://edis.ifas.ufl.edu/mg005

Please contact 727-582-2100 if you have additional questions.