Ok fairy....be nice to me!
Charley....there are many varieties of coreopsis some earlier than others. Mine,yes, have early start down here. Next year they will be earlier for you for sure. They flower from tips, in a way, but as repeat growth is usually shorter it looks like flowers are being produced lower down. One tip......keep deadheading. Easy to do every few days if you can, as you pass.,,the plants look better for it and they flower forever.
(would post pics but I'm posting too much currently....but they do look jolly good )
I actually like the foliage too Charley.....nice bright green, clean, crisp and well behaved so nice out of flower. I'm in far s. w. Cornwall, which has a milder climate than even a few miles further east down here.