I don't know what to do...Each year my coreopsis start out growing great and then once they begin to bloom a little, look like an elephant stomped in the middle of them. For the remainder of the season, they are beautiful, except for the giant hole in the middle of the plant! I don't know why... anyone else have this problem or any idea of what I can do? My mom has coreopsis too, but her's don't do this!
Thank you for any help
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