Are coreopsis usually susceptible to aphids?
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.
Certified GKH Gardening Expert
Even resistant plants can fall prey to them! With that being said, yes, this can be completely normal at times. There are a few things that you can do. These articles will help: https://www.gardeningknowhow.com/special/organic/natural-home-pesticides-organic-garden-pest-control.htm