Tag, Smooth or Common Alder

Tag, Smooth or Common Alder Alnus serrulata Full sun; wet to medium moisture level; tolerant of a wide range of soils; moderately acid to neutral pH. 10-20 feet height by 10-20 feet spread; forms male and female catkins in fall that turn into yellow tassels in early spring before leaves appear; fruit is a woody, cone-like structure. Growth Rate:  Rapid Maintenance:  Older plants can be rejuvenated by hard pruning, cutting back to 6 inches above ground when the plant is dormant.  Susceptible to alder aphids. Propagation:  Easy from seed and moderately easy from division or hardwood cuttings. Native Region:  Statewide Occurs naturally in wet, swampy soil of stream banks and bogs.  Constantly suckers from base and roots to form large colonies; good at stabilizing soil. Can fix nitrogen in the soil and is able to colonize nutrient-poor areas, build up the soil and make it fit for other plants to follow.  In fall, leaves turn yellow, tinged with red.  Transplants easily.  May be difficult to find in nurseries.  Attracts butterflies, birds, deer and beaver. shrub;sun;wet;clay shrub;sun;wet;loam shrub;sun;wet;sand shrub;sun;medium;clay shrub;sun;medium;loam shrub;sun;medium;sand

Photo Courtesy of John Hilty http://www.illinoiswildflowers.info/ Photo Courtesy of John Hilty http://www.illinoiswildflowers.info/ Photo Courtesy of John Hilty http://www.illinoiswildflowers.info/ Photo Courtesy of John Hilty http://www.illinoiswildflowers.info/