A blessing said upon seeing blossoming fruit trees in Nisan, or first time one sees flowering trees in the season.
The words of the blessing are:
בָּרוּךְ אַתָּה ה’ אֱלֹקינוּ מֶלֶךְ הָעוֹלָם שֶׁלֹּא חִסַּר בְּעוֹלָמוֹ כְּלוּם וּבָרָא בוֹ בְּרִיּוֹת טוֹבוֹת וְאִילָנוֹת טוֹבוֹת לֵהָנוֹת בָּהֶם בְּנֵי אָדָם.
Blessed are You, the Lrd our Gd, Sovereign of the universe, Who has not allowed lack of any kind in His world and created in it good creations and good trees to bring pleasure to humans.
[Posts tagged Birkat ha-Ilanot.]