Coreopsis Plants

Are coreopsis usually susceptible to aphids?

Zone Peterborough, ON CANADA | Sharon Dunford added on August 16, 2019 | Answered

My normally healthy coreopsis have a TERRIBLE infestation of aphids - so much so that I have lost the lot. I am even considering Malathion, it is so bad. Are they ordinarily susceptible to such pests? Normal soap and water, applied repeatedly, has not worked.

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    Certified GKH Gardening Expert
    Answered on August 19, 2019
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