There still time to say the Blessing / Bracha on the trees now, in the Jewish month of Iyar, according to Rav Ovadia Yosef. The proper time for this blessing, that is said once a year, is in Nissan, the month that Passover falls. But according to some Rabbis one can even say it this month, to not miss out on this beautiful blessing.
How:
Find one (a) or two (s) fruit trees blossoming with flowers that have not sprouted fruit yet.
Stand in front of them and say blessing.
Here is a link for the blessing and to find the fruit trees
At times a person gets disenchanted with life because they lose appreciation for daily kindness from above. Thus the Torah enjoins us to say the proper blessing on things we may take for granted, like on food, aromas, Mitzvas, the moon (once a month), on trees (once a year) and on the sun (once every 28 years).