Vegetables in Private Land
Question :

If vegetables are grown in a private field which is not fenced and there is public access to it, is it permissible for anyone to take and consume the vegetables without asking?

Answer :

If one passes through cultivated land that are owned by someone but not fenced, he is permitted to eat from it without damaging it or taking any plantings.

Fruits of the Neighbors
Question :

If the fruit of the tree is growing in the yard of a neighbor or into the street over the fence, is it allowed to consume them without permission?

Answer :

It is permissible to consume them if one is sure of the owners satisfaction. Otherwise, it is not permissible.