The boxwood have spider mites. The mites are sucking the cell contents out of the leaves causing stippling. University of Memphis Director of Landscape Joellen Dimond says you can control the spider mites with horticultural oils or an insecticide labeled for use on them. She says spider mites often attack plants that are under stress. She recommends looking at the growing conditions of the healthy plant and trying to replicate that as much as possible with the other plants. UT Extension Agent Booker T. Leigh says sometimes plants grown in containers may experience stress because the container is too small or not draining well.

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