Do not provide extra water to the butterfly bush during periods of drought. Allow the leaf curl to continue from a lack of moisture.
Avoid pruning the butterfly bush to remove limbs that are infested with spider mites. Do not cut out the infested limbs to prevent possible spider mite spread.
Leave the spider mites intact on the leaves of the butterfly bush rather than washing them off with a garden hose.
Do not apply pesticides or organic controls such as liquid dish detergent to discourage or kill spider mites on the shrub.