With the coldest March and April in decades, we simply haven’t had very many days to warm the soil yet. With the cold, the crapes are a bit tardy this year. They will be growing extremely fast in a few weeks, and covered with flowers for months by mid summer! In areas with reflected heat from a wall, yours may be further along than this one. There is still time to do some major pruning, thinning, and limbing-up, because they bloom on new growth only.