I had very similar experience to coolplantsguy. It tended to run, but not mound up. Very little bloom. It was shovel pruned after about 3 years. I have pretty well stopped growing coreopsis period. Zagreb is the last one, and if it doesn't do better this year, it's gone too.

Really weird things can happen with plants. TWO years ago, I planted a variegated Duranta in one of my beds. I was disappointed last year when it did not return, and since it was at the back of the border, I never dug it out. There was just a little tuft of sticks there. This spring, lo and behold it came back! Duranta is a tropical! Go figure.

Paul, Buddy is so beautiful. I'm so sorry for your loss. Maybe this story will make you chuckle... Years ago when I was little, we lost our beloved German Shepherd, and my father, whom she adored and who adored her, insisted on digging her grave alone. Although he was crying so hard he almost couldn't see, turns out he didn't have enough breath to dig through Maryland clay and cry at the same time. Down through six feet of clay and stone he went, but in his grief he overlooked one thing...how to get himself out of the hole he'd dug! There he was on a 100-acre farm, deep in a hole over his head. After yelling for help (no-one heard him as he'd told us all to leave him alone) and thinking it over awhile, he carved himself footholds and climbed out...then realized he'd left all the tools in the hole! So he jumped back in, threw the tools out of the hole, and climbed out a second time. Then he laid her to rest himself, wrapped in her blankets with all her toys. Only then did he have us bring her all the fragrant red roses from the bush she used to lie under. I'm so sad to hear about your mother, too. I'm sure she'll be comforted to think of her wonderful faithful Buddy waiting for her.

Buddleia seed pods are shaped like elongated footballs. Not all buddleia produce these pods though; I believe the yellow varieties are sterile (but don't quote me on that). My Honeycomb never produced pods. Here's a pic on a GW FAQ Can't help on the coreopsis though...