Hope you don't mind a plug for this (my daughter went to Leicester uni). If I get a chance I'm going to go as it's been a couple of years and it's well worth it.
NEW DATES FOR CROCUS SUNDAYS. Owing to the advanced season our Crocus Sundays will be brought forward by one week. The new dates are: 27th February and 6th March 2011. A stunning display of Crocus tomasinianus will be at its best (weather permitting), also a woodland walk with early flowering species and the Alpine House with a magnificent array of bulbs.
11am - 4pm, entrance by donation to Hope Against Cancer. Refreshments will be available. Note also that there will be a SALE OF SPRING PLANTS on the 6th March date.
There website is
http://www2.le.ac.uk/projects/botanic-gardens