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| Creeping St. John’s Wort Hypericum calycinum |
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| A semi-deciduous sub-shrub growing to 1 foot tall and spreading by vigorous underground stems. Leaves are 2-4 inches long, medium green in sun, yellow green in shade. Flowers are bright yellow, 3 inches across. A tough, dense groundcover that competes successfully with tree roots, takes poor soil, and some drought. Can invade other plantings unless confined. Clip or mow off tops every 2-3 years during dormant season. | |