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Zone Denver | cherylhorst added on July 25, 2017 | Answered

how long is their blooming season

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Answered on July 25, 2017

I have one that has been blooming for over a month. It was a volunteer. Every time I've tried to grow hollyhock, the plants suffered from rust - a common problem - which lessened the vigor and the bloom time. I deadhead the plants, at least the stems I can reach, to keep it from self-sowing everywhere. This may encourage it to bloom longer.

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