What is considered a new fruit on which one may recite Shehecheyanu on Rosh Hashanah?

Greetings, 

Only over a seasonal fruit that is not available all year may one recite Shehecheyanu. However, over a fruit that is available throughout the year, one may not recite Shehecheyanu, even if you have not eaten it since Passover.

Sources: The Shulchan Aruch, Orach Chayim (siman 225, seif 6), writes that over a fruit that does not renew itself from year to year, even if many days have passed since one last ate from it, one does not recite Shehecheyanu. And the Mishnah Berurah (seif katan 16) writes likewise regarding something that does not grow from the ground, such as poultry and fish that came his way, even if he has never tasted their kind before; even so, one does not recite Shehecheyanu over them, because that species is not new in essence, for although he has not eaten from them, others have eaten from them.

May you be written and sealed for a good year,

Hillel Meirs