I have a stand of superbum. It took two years to bloom. They seem to like it on the moist side. Bloom this year was a little more sparse(year six), but I had added a hydrangea nearby, and I beleive I had planted it too close. It was apparantly suckling up some of the moisture that the superbum needed. I replanted last week a little farther away. The bulbs look robust, with nice increase. Be patient, and water a bit at least once a week. I hope this is helpful.
