その植物は

that plant

→ 其の
phrase Rare #36,631
that plant その植物 means “that plant” or “the plant,” and は marks it as the topic of the sentence.
JA: その植物は部屋の中で育てています。
EN: I grow that plant indoors.

その植物は水不足枯れた

The plant withered due to lack of water.

その植物は霜で被害を受けた

The plant was damaged by frost.

その植物はその地域特有のものだ

That plant is native to the region.

その植物は直射日光当ててはいけない

That plant should not be exposed to direct sunlight.