There are several different types of plants you are asking about from
annuals to perennials to woody shrubs. Let's start with the woodies.
Crape myrtles bloom on new growth. If they need it, prune them before new
growth begins in late Feb. Weigelia is a late spring bloomer, but it has its
flower buds set now, so prune it after it blooms. All ornamental grasses
benefit from a haircut before new growth begins--in late Feb through mid
March. Before pruning, check to see how much new growth there is, and then cut
as low as possible, without cutting into any new green. Coral Bells--or
heuchera ( I assume you mean the perennial--not Coral bell azaleas) is a
semi-evergreen perennial. Often you will have some cleanup to do in the spring
before new growth begins. Lantana is a summer annual/perennial. In some parts
of the state it comes back easier than in others. It is rare to see any
lantana resprouting above ground. Usually it will come back from the crown,
with the upper portions burned back by winter, so cutting back the dead
foliage before new growth begins is beneficial.
(February) If you have time, I would sure like to know when you would recommend
pruning Crepe Myrtles, Lantana, Coral Bells, Weigela, and Dwarf Maiden Grass. We
planted all these plants last summer.