The Q&A Archives: Sweet William

Question: Is Sweet William a perennial? I heard that it blooms mid summer and again in the fall. Will it come back next year as well?

Answer: Sweet William (Dianthus barbatus) is a biennial, meaning that the plant grows one year, and flowers the next. There is a new variety of sweet William ('New Era') that, when planted early, blooms both years. There are other Dianthus species that are annuals (D. chinensis, D. caryophyllus), others perennials (the "pinks").

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