"Why was the Torah likened to a fig tree? Because, while the fruit of most other tree – the olive, the vine and the date – is gathered all at once, that of the fig tee is gathered little by little. It is the same with the Torah. One gathers a little learning today and much tomorrow, for it cannot be learned in one year or in two years." (Midrash Rabba, Numbers 21:15).
POMEGRANATES: "Rabbi Meir found a pomegranate; he ate the fruit and threw away the peel. This is to teach us to differentiate between the main thing and things of secondary importance." (Babylonian Talmud, Tractate Hagiga, 15b).
"Why is Israel compared to an olive? To tell you that just as the olive produces its oil only after being pounded, so Israel returns to the right way only after suffering." (Babylonian Talmud, Tractate Menachot, 53b).
"Why is Israel compare to the date palm? There is no waste in any part of the date-palm. The dates are eaten, the lulav branches are used for Hallel prayer, the dried branches are used for thatch, the fibres for rope, the leaves for sieves and the planed boards for roofing. So it is with Israel that none is worthless in Israel. (Midrash Rabba, Genesis 41:1).
EAT LOTS OF FRUIT:
It is the custom of some to eat 15 types of fruit on Tu BiShvat, while others eat of the Seven Species with which the Land of Israel is blessed. It is the custom of many, however, to partake of fresh fruit, dried fruit, cooked and preserved fruits, to the number of fifty, while others partake of 100 types! (Rabbi Haim Flaji, The Appointed Festivals for All Living, 654b).