The plums’ aroma is really fragrant during this season.
This is a single kanji with an い on the end, meaning you know it's probably an adjective. What's the adjective form of perfume? Sweet or fragrant.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn this reading yet, so here's a mnemonic to help you:
If you want to smell a sweet fragrance, just open some potpourri. But be careful if it's a can. Fragrant cans will baa (かんば) like a sheep at you when you open them. That can baa is just a sweet smell side effect.