Yellow loosestrife, also referred to as circle flower, is prized for its tall elegant flowering spikes making it useful for the perennial border, bog garden, or along side of a water feature.
As a herbaceous perennial, yellow loosestrife assumes an upright growth pattern with whorled leaves, and provides a good solid mass of green throughout the season. Leaves are pubescent (hairy), ovate to lance-shaped, and up to 3” long. Flowers are cup shaped, five-petalled, bright yellow in color, and are borne in whorls along the stems. Flowers appear in June through early July and can attain a width of 1” when fully open.