The orange bloom is a daylily, not an iris. It needs at least part sun, and despite nursery hype, it is not really drought tolerant. (I grow a lot of them, so believe me, I know.) Basically fertilize in the spring and then again in the fall (to set buds for next season), using time release fertilizer that is roughly 3-1-2 NPK (or at worst 1-1-1 NPK), preferably with micronutrients. Also, in spring it is helpful to give it a dose of minerals (Ca, Mg, Fe) and also give it some alfalfa meal (make sure it doesn't have salt, use the horticultural kind, not stuff from an animal feed store) which provides slow release nitrogen and growth hormones. (Daylilies are heavy nitrogen feeders and they love alfalfa!)
Do NOT overwater and/or have a lot of fertilizer in hot weather, as that promotes rot.
Do NOT water at night - make sure there will be plenty of time for the foliage to dry, because many daylilies are susceptible to foliar diseases, the worst of which is daylily rust.
The other one looks like it may be a beardless iris, but I defer to the experts on same.
