Dayflower is an annual with multiple branches that spread by taking root from nodes along stems. Stems are smooth with lance shaped leaves in sheaths having a few soft hairs. Flowers have three blue petals, two of which are partly fused. Flowers last one day, giving the plant its common name. Dayflower reproduces from seed and from nodes along stems. Stem fragments will also reproduce. Dayflower prefers rich, moist soil conditions. Dayflower is found from Massachusetts west to Kansas and south to Florida and Texas.
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Dayflower plants can be physically removed when small. Care must be taken to remove all stem fragments to avoid reestablishment.
For optimum control, make your herbicide application to dayflower that is actively growing and in the seedling to flower stage of growth.