Ruby Spice Clethra Leaves Curling, Deformed, And No Flowers

Question

I planted 2 clethra last summer and they did well with flowers by August. This summer the upper leaves have started curling and there are no flowers. What could be causing this?

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Answer 1

Spider mites can be a problem with cleathra, especially if it is planted in a hot, dry site. They perform best in shaded areas in moist, well-drained acidic soil. Compare your growing conditions with those below.

https://www.gardeningknowhow.com/ornamental/shrubs/summersweet/summersweet-plant.htm

https://hgic.clemson.edu/factsheet/summersweet-clethra/

https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-treatment.htm