Bush honeysuckles can be recognized the opposite, toothed leaves along slender twigs and clusters of tubular yellow flowers with long stamens and pistils protruding from the flowers. The yellow flowers turn reddish-orange as they age. The fruit is a dry capsule with long filaments. The new growth of 'Copper' is coppery-red, fading to olive green, especially in shaded parts of the plant. This was one of the earliest shrub honeysuckles cultivated for the foliage color. They tolerate a wide range of moisture and light conditions and will grow in clay or other poor soils. Plants can spread by suckers and may form colonies. Fall color is reddish-purple. Plants in the genus Diervilla are small native American shrubs that are not the same as the weedy honeysuckles in the genus Lonicera, but they are related to weigelas. They bloom starting late June, and continue sporadically until September.