Cypripedium Pueblo bloomed from the 4th of May till the 25th so a good three weeks of flowers. It has been a strange combination of some very dry quite hot periods but it has been overwhelmingly cool and wet.
Cypripedium Kentucky bloomed from 25th of May till the 12 of June, slightly less than the Pueblo.
I will update this with any other Cypripedium I grow. This year I won't have any info on the Cypripedium Henryi because I bought it in flower.