Was a cold period (snow last Wednesday).
It thinned out the crocuses in bloom.
Think the larger purple and white Crocus vernus-related crocuses where more affected than the smaller yellow-ochre C. flavus-related crocuses.
Today (much warmer):
First species tulip.
A white species crocus and Iris reticulata.
I. reticulata, Chionodoxa 'Giant Pink' and C. flavus.
C. 'Giant Pink'.