According to my understanding (and please, correct me if I'm wrong), the Bracha of Shehechiyanu (שהחינו) on fruits [and some vegetables?] is recited the first time one partakes of a particular seasonal fruit.
Which modern-day produce is actually seasonal? I may not be too familiar, but aren't almost all fruits and vegetables available year-round these days? And if so, what fruits actually require a bracha of Shehechiyanu (especially pertinent to Rosh Hashanah night)?