3,718. What's a Sapling?

Hilchos Shemittah v’Yoveil 3:6

If the saplings (in the previous halacha) are planted in a row or a semicircle, we may only plow what each one needs. If there are gourds among the saplings, they can be counted as part of the ten.

Hilchos Shemittah v’Yoveil 3:7

The definition of a sapling is a small tree for as long as it’s referred to as such.