Please any advice someone might have will be most helpful! I first purchased my coreopsis last fall and it of course was fine. It had a few aphids, but neem oil took care of that. It wintered ok, but got quite a case of powdery mildew so I had to trim it back severely and moved it to a new location. Now I'm having a different problem. New growth came back quite quickly this fall, especially after fertilizing, but after a couple weeks any new growth ( and old) started to dry out at the ends, and it just progresses backward toward the stem, effectively dropping all it's leaves. It finally got some blooms but they don't open fully and some dry out before even opening. I have moved it into less sun, given more water, more fertilizer, I am completely stumped as to what could be wrong. Is it just my location? It has been really really hot here lately, my mums are starting to burn a little on the edges of their leaves too, so I just figured maybe because they both thrive more up north that maybe it's just a temperate zone problem. What can I do to save it?