Superthrive shouldn't cause a permanent problem. If the problem is due to other reasons, it may or may not occur again. I have personally used Superthrive since 1990 on a regular basis and have never had a deformity problem I would attribute to it. I just don't use high doses of Superthrive. Many plants have the occaisional deformed flower for often unknown reasons. Others (often meristem clones) can have a permanent genetic problem that leads to deformed flowers on a regular basis.