I suppose they were either planted just before we got there and needed some time to grow to flowering stage. The other variable that changed in this uncontrolled experiment is that some of the trees on our side and on the other side of the creek that were shading this clump and others by the creek have fallen down and been removed. Thus it is sunnier in these locations than before.
The only reason I want to know what finally got them to bloom is I may want to encourage these plants in the future and need to duplicate the conditions. Time means just wait, but sun means choose the planting location carefully. Are there any experts out there with an explanation?
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