Thanx Carol, Ursula.
The Opuntia has been with me a few years now and this is the third year it has bloomed. I have only repotted once and it needs to be done again. I guess it is a maturity thing, but you are probably correct on the winter chill needed to bloom. Many of the cactii I have need that winter cold to bloom, like Gymnocalycium schneiderianum v. longispinum and they all stay out all year.
