Greg,
Any of the them as they all bloom sometime January to Late february, depending on your zone. If you hadn't seen it bloom, you may have smelled its soft sweet fragrance.
S.hookeriana is the shortest, spreads by runners.
S.ruscifolia - shrub to about 5' x 5'; red berries
S. confusa - shrub to about 3' x 5'; black berries.
I've grown all three & have found them to be excellent performers.
I think your S. hookeriana will grow better in the ground - they really like to send out runners. They are not in any way invasive, though. Mine slowly formed a nice 15-20' long"hedge" along a walkway.
I found them to perform better with part sun. They were all shaded from 11 - 2 or so from the sun, and got blasted from 3 until sunset. Moist rich soil with zero pests - a winner!
