Springtime brings with it special blessings of thanks. This blessing, recited upon seeing fruit trees in bloom, thanks God for a perfect world, filled with trees and creations for us to enjoy. From the Shulchan Aruch, Orach Chaim 226:1.
Blessed are You, [Source of all Life], for nothing is lacking on His universe, and He created in it good creatures and good trees, to give mankind pleasure.
Sources: Moment Magazine, April 2002