My crocus also bloomed on March 27 here in Greenwood, NE.
The plums and some other fruit trees were blooming inside the city of Lincoln Nebraska on March 30th. Dandelions blooming in Greenwood yesterday (April 9th). Still no dandelions or fruit trees at my house in the country (just outside of both cities) yet. But looks like the next sunny day they will.
Saw early fruit trees (some ornamentals that I don't recognize and some wild plums) blooming near Omaha in the country yesterday (April 12). None out by my house yet but they looked on the verge yesterday. I'll see when I get home tonight.
Drove out to an apple orchard to check. A couple of trees blooming. A few more that look like they will bloom soon. The rest look like it will be a few days including the one in my yard. April 15th.