One month on, to answer my own question, they're now all on on the brink of flowering. But hopefully they'll come back taller and stronger next year. Good lesson on spacing. These were planted 45cm apart which felt way too sparse at the time but now looks almost too crowded.
Interestingly, echinacea I sowed (a little later) and planted elsewhere is nowhere near flowering. One to look forward to next year.
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I live in west central Scotland - not where that photo is...
Interestingly, echinacea I sowed (a little later) and planted elsewhere is nowhere near flowering. One to look forward to next year.