If you want some pro-tips, I would gladly give you some. I am guessing your bro has probably given you some already. The first thing you need to know is that the hibiscus tree should be watered every day once the weather warms up. You should have used a bigger pot. For several years I had hibiscus trees in some large 3 ft tall pots. They are a cool plant, but in the heat of summer they drink lots of water. I run drip irrigation to all of my plants so I don't have to mess with watering anything. I leave for a week, come home and everything still looks awesome.
I'm definitely going to repot the hibiscus, had already used all my large pots when my brother dropped it off.
What did you do with it during the winter? I just plan on moving it next to a window in the garage.
hummingbirds love hibiscus plants

dobber gave good advice. they basically require damp soil to flourish. winterize in garage, and be on the lookout for aphids. ben ji lil bro brought you a nice haul, aside from the petunias. P U