Coreopsis verticillata moonbeam

in Plants
Can anyone please advise if this will start to regrow later in the year? I wasn’t sure if to cut it back last year so left it, anyway just read I should have and now there’s little sign of regrowth, just a bit of green at the base. Tell me all is not lost, it was such a beauty!
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I've only had it a couple of years and as far as I can recall, it looked like this this time last year.
My two that are sprouting look just the same as this.