The Q&A Archives: Dianthus

Question: I have a border of dianthus, one is turning all brown, from ground up. I planted them last year. What's going on?

Answer: Although there are exceptions, Dianthus is mostly a biennial, meaning that in their second year they set seeds and die. Usually they self-sow unless you have been diligent in cutting off the spent flowers. The seeds they scatter in the garden will sprout into new plants. I'd remove the dying plant and either wait for any seeds it may have spilled to sprout, or replace it with a new dianthus.

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