This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means plant, so the verb version is to plant something or to grow something.

You haven't learned this reading for 植 yet, so here's a mnemonic to help you:

You decided to plant an uni (う) tree in your backyard. That's right, you can plant sea urchins and they'll grow like fruit off a really spiky tree. Just picture it. And then you'll get to eat all the uni you want!