Mishnayos Orlah Perek 1 Mishnah 5

ובו בריכה – it was the custom of those who work the ground that they dig a hole and take one shoot (especially of a fig-tree) from the tree and hide it in that hole and the root of that shoot comes out from other side and becomes a tree there and the head of the shoot remains attached to the tree. But the law of Orlah does not apply while it is still yet attached to the tree and absorbs from it, even though it also absorbs from the ground. But if the old tree is uprooted from the ground and it is found that all of its support and its absorbing is now from the young shoot.

חזרה הזקנה להיות כבריכה – and both of them – the old [tree] and the young shoot- are as if they were planted now and we count for the three years from the time when the tree was uprooted.

הבריכה שנה אחר שנה – after the first young shoot had grown, he took from it one young shoot and sunk it into the ground and he did this several times, one after another.

מונה – [he counts it – the years of prohibition under the law of Orlah] for all of them from the time when the first young shoot broke off from the tree.

ספוק גפנים – [the connection of grape vines (by training and engrafting)] – it is the manner of those who work the ground that they take a long vine-shoot from this grape-vine and stretch it to the grape-vine that is by its side and engraft the vine-shoot on to the grape-vine. That is what is called “engrafting,” and it is exempt from the laws of Orlah. But that which is taught in the Mishnah (Tractate Sotah, Chapter 8, Mishnah 2 and Tosefta Rosh Hashanah 1:4) – that all are the same are the ones who plant such a tree, who sink them into the ground, and who graft them – are liable for Orlah. There they are speaking about when he severs the vine-shoot from the vine or the young shoot from the tree and afterwards sinks them or engrafts them.

מקום שכחה יפה מותר – if the vine-shoot that he sank in the grape-vine where the vine’s growth was healthy and it absorbs/sucks from the grape-vine from where it was taken, it is permitted and exempt from Orlah, but if the vine’s growth was poor, it is liable for Orlah, but the Halakha is not according to Rabbi Meir.

והיא מלאה פירות – if he detached them immediately, they are permitted because they grew while permitted, but if he left them on the tree and they grew after they had been broken off and there isn't I the fruit that grew already by [one-] two-hundredth [part] to annul the supplement, it is prohibited for Orlah prohibits them until [one-] two-hundredth [part] growth. And the same law applies in an old tree that was uprooted and on it are fruits and he went back and replanted them.