Answer: I think it would work. These plants germinate best at warm temperatures and grow faster when it is warm. In my garden, they self sow and seem to bloom at about the same time as the ones I start indoors! You may also find that later-planted plants survive the winter and bloom again the following year, or you may find that they act like annuals and don't come back, mainly because they exhaust themselves by blooming until hard frost. I love these plants, too!
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