Blooms lasted over a month and now time to deadhead. Cut to just below the spent bloom and above any bud/color. If I remember correctly, there is no major second flush but some random flowers late in the season. The Black Eyed Susan next to them have already showing their bright yellow blooms.

Home garden in western Canada zone 7

https://homeguides.sfgate.com/deadhead-blazing-star-plants-64606.html

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