The food we consume also influences our spiritual composition. The excellence of the fruits of the land of Israel does not stem from their flavor, size, and beauty alone. Beyond these virtues they enjoy a spiritual distinction: they possess sanctity.
Tu Bishvat - The Bond Between the Jewish People and Eretz Yisrael
On Tu BiShvat we affirm that the connection between Am Yisrael and Eretz Yisrael is absolute and eternal, a Divine connection, and that nobody and nothing can separate the People of Israel from their land.
The act of planting of fruit trees in the Land of Israel, beyond possessing obvious Jewish and Zionist significance, is a way of clinging to God and walking in His ways.