Answer: This plant is a biennial and grows foliage the first summer, lives over the winter and blooms the second summer. Once it sets seed, it dies off. If not deadheaded, the plant will often self seed in the general area to create an ongoing patch. If you mulch over top of seed or smother small seedlings, they will not grow. If you have small transplant size seedlings then you can mulch carefully around but not over top of them.
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