Tropicals & Tender Perennials: Brug Problems, 1 by Buns

Buns wrote:
I have had brugs for many years and have some very large plants. Last year the older ones didn't come back as healthy as before and didn't bloom as often. They seemed to have problems with curled leaves. I have treated them all with Bayer Advanced 2n1 Systemic Rose and Flower care and they are coming back with the same problems this year.

Can anyone help I am attaching some photos and can do more if you need to see them.

Susan (Buns)