When does one say the Shehechiyanu?

Hi,

We recite the "Shehechiyanu" blessing before reciting the normal blessing on eating the fruit, so as not to interrupt between the normal blessing and the act of eating the fruit.

One who eats a little and then remembers to recite the Shehechiyanu blessing may still recite it. The key is that he should recite it only so long as he feels special enjoyment from the new availability of the fruit.

(Mishneh Berurah 225:11)

Have a great day,
Mordechai