Dahlia Leaves Are Curling And No Bugs Have Been Detected

Question From: M. Misner - Crete, Nebraska, United States
Q: Leaves are curling. No bugs have been detected.
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A: Aphids and spider mites both cause curling. They can be almost microscopic so I suggest you use a 10 power magnifying glass to do your sleuthing in the garden. A stiff stream of water will knock them off the plants. Best And Happy Yardening, Nancy