About the rhubarb, I have never seen mine get frozen in the spring. It seems to have some frost tolerance too. Hey, if you have some nice stems harvest it. Yes, it will grow up again if you harvest or if it freezes.
My rhubarb is just coming up. So that tels you how much behind you our season is. The daffodils are just starting to bloom. The apricot tree has not bloomed. I dumped another 0.94 inch of rain out of the gauge this morning. Wet, wet, wet!
Gardening at 5000 feet elevation, zone 4/5 Northern Utah, Frost free from May 25 to September 8 +/-