Orlah Indoors

As we wrote, the Yerushalmi states (ibid.): "A tree planted in the house is subject to orlah." The Rambam (ibid.) rules accordingly. Penei Moshe explains that in reference to orlah, the Torah does not write "sadeh," field; rather "aretz," land ("When you come to the land and you plant trees"); so planting indoors also qualifies as "in the land."