This is the worst plant shelf ever. 
I got a splinter putting it together because it was splintering as I was touching it. Also not holes lined up and it's crooked on one side and for the other I had to use my own screws and drill extra holes. I don't think this will even last a year on a balcony. It will fall apart very soon. It's also not sturdy at all it wobbles every time I touch it.