Hi, I live in NYC and I have a floribunda rose in a large container on my balcony. I got it last spring and it survived the NYC winter with plenty of new growth this spring. It was doing so well and already has tons of flower buds on it. I applied Bayer 3-1 fertilizer earlier this year. There was a late Spring frost but the rose seemed fine after that.
However about a month ago I noticed the leaves ragged and turning yellow/brown on the edge. Bits of the leaves were also missing, but it did not look like insects bites, more like an animal tearing the edges off. More and more leaves turned ragged and started falling off, but the flower buds continued to grow and look healthy. I'm attaching 2 pictures where you can see the leaves missing the top part.
It's on a balcony that gets lots of afternoon sun and wind as I live in a high rise. There're no beetles/insects around as the floor is high. What is happening to my rose? I water it every week thoroughly. Am I overwatering, underwatering? Is it fertilizer burn?
So far, it doesn't seem that it's affecting the flower buds, but I'm afraid that eventually it will if it's a disease. Can someone help? Thanks!