Do most heucheras bloom at the same time? I don't have many, but all except 'Palace Purple' are blooming now. I have already deadheaded several. If I recall correctly a few, like 'Paris' seem to have blooms for a longer period of time.
Most of mine are blooming now, or at least have their flower scapes starting to come up. The exceptions are 'palace purple', 'bronze beauty', 'caramel', and 'christa'. The latter 3 are all villosa hybrids (I think) and I was under the impression that villosa hybrids bloomed later... but I could be wrong.
For me, 'paris' and 'hollywood' have the longest bloom time lasting from late spring - early fall.
Some of the newer ones rebloom again in summer.