1,154. Orlah and Neta Revai

173:1 All trees that grow edible fruit have a prohibition against orlah, whether they belong to a Jew or a non-Jew, even if they were grown in pots without holes. This means that for the first three years after planting, it is forbidden to derive benefit from the fruit, seeds and/or skins. The three years are not counted day by day; rather, if one planted before 16 Av, there are still 44 days until Rosh Hashana, so it is considered like a year. This is because we give 14 days for the tree to take root and the 30 days remaining to the year count as a full year. We then count two years from Tishrei. However, if the tree was planted on 16 Av or later, that part of the year doesn't count for anything and we count three years from Tishrei.

173:2 The fruits of the fourth year are called "neta revai" and they must be redeemed. One redeems them by picking when they sufficiently ripe and taking a silver coin or permitted fruit that is worth at least a perutah (a small coin) and saying, "With this, I redeem the fruit that is neta revai." He takes the coin or the fruit, crushes it and throws it in the river. One does not recite a bracha on this outside Israel.