Halacha Orach Chaim 226

When seeing fruit tress beginning to blossom in the early spring, One should recite a Bracha on the tree blossoming. The Bracha is brought in Orach Chaim 226.

Ideally the Bracha should be recited on blossoming trees that grow edible fruit. Shevet Halevi rules that if someone recited the Bracha on a tree that does not bear fruit, or even if it was recited without looking at a tree at all, the Bracha should not be repeated. The reason for this is because the Shulchan Aruch does not specify that one most look at a tree, rather, the Bracha should be recited during the season when trees are beginning to grow their fruit.

This Bracha can only be recited once every season. If someone delayed the Bracha to the point that the fruit began to grow, there is a discussion if a Bracha can still be said. According to Eliya Raba, the Bracha can be said. However, if the fruit grew to the point that it would require a Shehechiyanu for someone that has not tasted this fruit or seen it for a whole season, the Chaye Adam implies that all would agree the Bracha should no longer be recited.

If someone saw a budding tree, and did not recite the Bracha, he can still recite it, and the Bracha is not lost the next time a budding tree is seen.