In very heavy shade, it is impractical to maintain an attractive lawn and you may want to consider shade-adapted ground cover. My roses have orange spots on the leaves. It is rust, a fungus infection, which is spread by windblown and water-splashed spores. Heavily infected leaves turn yellow or brown and may drop prematurely but a moderate rust infection, particularly on the undersides of leaves, may not harm plants. Rake up and dispose of any infected leaves.
Fungi infect with mild and moist conditions.
Avoid overhead watering. The roses I planted this year are blooming but don t look as I expected from the pictures. I live in the city of Sacramento. If possible, see a plant in flower before selecting it for your garden. There are lovely rose gardens in Sacramento, such as at Capitol Park and McKinley Park, where you can see many varieties blooming.