The Proper Time for the Blessing of the Trees
Our Sages, who have established the Blessing of the Tress, write that the proper time for this blessing is during the month of Nissan, for it is then that trees begin to blossom and buds come forth. It would seem from the words of our Sages though that this blessing may only be recited during the month of Nissan and not at any other time.
Countries where the Trees Blossom at other Times
A problem exists in the United States, for not always during the month of Nissan do trees begin to blossom. Therefore, the question becomes whether or not one is permitted to recite the Blessing of the Trees in the month of Iyar.
The Sefer Ha’Eshkol (authored by Rabbeinu Avraham Av Bet Din, one of the great Rishonim, page 68) writes that one should recite the Blessing of the Trees during the month of Nissan, however, this does not mean that the blessing must be recited specifically in Nissan; rather, this refers to the first time that year that one sees the trees blossom. Similarly, the Ritba (Rabbeinu Yom Tov ben Avraham Elasvili) in his commentary on Tractate Rosh Hashanah (11a) writes: “This does not necessarily mean Nissan; rather, every place based on when the trees blossom there.” Many other Poskim rule likewise.
Thus, one may recite the Blessing of the Trees based on whenever the blossoming of the trees occurs in one’s current location, for there is no specific requirement for the blessing to be recited in the month of Nissan; the only requirement is the spring blossom, which usually occurs during Nissan.
On Which Trees One May Recite this Blessing
One may only recite this blessing on fruit-bearing trees and it may not be recited on barren trees. Nevertheless, if one mistakenly recited this blessing on a barren tree, one should not repeat it upon seeing a blossoming fruit-bearing tree.
Some say that one may only recite this blessing when seeing a minimum of two blossoming fruit trees. Other rule that seeing one tree is sufficient. In pressing circumstances, Maran Rabbeinu Ovadia Yosef zt”l one may recite the blessing on one tree. Nevertheless, it is especially praiseworthy to recite the blessing on several different kinds of fruit trees.
Regarding trees that are grafted from two different species, for instance, a tree grafted from Etrogim (citrons) and lemons, some are of the opinion that one should not recite the Blessing of the Trees upon seeing them since their existence is against the will of Hashem; thus, one should not thank and praise Hashem for them. Others argue and write that since this blessing pertains to the entire creation in general, one may even recite it upon grafted trees. Although if one wishes to recite this blessing on such a tree there is no need to protest, it is nevertheless preferable not to recite the blessing on such a tree due to the famous rule, “When in doubt regarding a blessing, do not bless.”
However, there is much room for leniency in this matter regarding trees which are not so clearly forbidden to graft, such as citrus trees including citron, lemon, “Chushchash” (wild oranges), and grapefruits, for according to Maran Rabbeinu Ovadia Yosef zt”l (see Responsa Yabia Omer, Volume 5, Chapter 19 and Halichot Olam, Volume 2, page 200), one may instruct a non-Jew to graft such trees with one another. Based on this, the existence of such trees is certainly not against Hashem’s will and the Blessing of the Trees may be recited on them just as it is customary to recite the “Shehecheyanu” blessing on such fruits, as we have explained in another Halacha.
One may recite the Blessing of the Trees upon a tree within its first three years of being planted, for although it is Orlah and forbidden to benefit from, since it was not planted in a prohibited manner (as all trees are forbidden to benefit from during their first three years of being planted), this blessing may be recited upon it.