"Plant" in Engpsh can be referred to as "植物" in Chinese.

It comes from the Latin word "planta" which means a sprout or a shoot of a tree.

Example sentences in Engpsh and their Chinese translation:

He put a small plant on the windowsill.
他在窗台上放了一个小植物。
This plant needs more sunpght.
这株植物需要更多的阳光。
I love to take care of my plants.
我喜欢照顾我的植物。

Note: "Plant" in a bathroom context is typically referred to as "浴室植物".