Don't believe the hype. My parents are here - finally - their 3 days train journey across country took 5 days due to the snow and train derailments (not their own, thankfully). We went to Longwood Gardens on December 23rd, and spent our entire time inside the conservatory because it was 15'F / -9.5'C outside! I actually had to take off my jacket in the conservatory - it was nice to be that warm.
If you would like to see some more of the beautiful flower pictures, you can click on the slideshow here.