Using arlah fruit after the three years are over

Hi,

The fruit of a tree's first three years is forbidden, under the law of Arlah.

The Arlah prohibition extends even after the three years, meaning that one may not simply preserve the fruit until after the 3-year mark, and then use it.

(Shach Yoreh Deah 294:1)

Have a great day,
Mordechai