It took my epimedium a handful of years to get going -- but it's almost a thug now. Mine are not under pines... but they are in full shade. I'm planning on moving them around the back of the house under some dense trees where they will be in dry shade. My neighbor worked at a big well known perennial nursery for nearly 20 years, and she told me instead of yanking out the epimediums and tossing them, move them under those trees where nothing else wants to grow and they will be perfect there.
I have been pulling out the Sol. Seal because it's spread so much near my house foundation where it gets nearly no water and no light.
