Nut trees

Hi,
I planted some nut trees, two to three months ago and they still didn't replenish.
Do they also need to be polinated by bees or butterflies like the fruit trees?
Thanks in advance!
Best regards
I planted some nut trees, two to three months ago and they still didn't replenish.
Do they also need to be polinated by bees or butterflies like the fruit trees?
Thanks in advance!
Best regards