Clivia miniata with orange/brown spots

I have a Clivia miniata planted into the soil in a shaded ( no sun) corner of the garden which has orange/ brown spots here and there on it’s leaves and edges of leaves. What is the cause of this and how can I put it right. This is it’s first year, when can I expect it to bloom ? I always make sure there is plenty of snail bait around it as I know that they love them.