I was raised on the Texas coast and attended college here in Abilene. Each year at Spring Break it was always obvious that Spring starts on the coast and works its way inland. An early Spring Break meant fewer flowers but the amount of green visible in South Texas was always much greater. Usually the dividing line was somewhere near Austin: GREEN below the line and blah brown to the north. So if you have to see bluebonnets right now (in person not pictures on the internet) hop in the car and head south. Usually the hill country is prime bluebonnet country. There are often very nice displays along Interstate highway 37.
I'd love to hear from you if you have a favorite place for bluebonnets or other wildflower displays. Email me.