I had a small penta, but I lost the tag to it. Seems like it was a SUN plant.
Planted it in the sun this spring and it started to shrivel. I figured either it didn't like the fumes from my swimming pool, or the earth drained too fast for it.
So, put it back into an el cheapo pot and it seems to be growing again. It now gets morning and noon sun, afternoon shade. Darn it, I really thought it was a sun plant.
Then, I saw an established penta that blew my socks off. In a large pot, in a sheltered entryway, but facing west. This thing is humongous and had many, many heads of flowers. The owner said it had wintered in the pot, on the porch. Which means it got next to no sun during the winter.
Have I totally misunderstood pentas? Where do y'all place yours for best growth and flowers?