When the scene tends toward the monochromatic outside, they add a little dab of color from an Osage orange. They take an orchid and give it a standout setting anchored in moss and accented by twigs. Pine boughs lend texture. Dogwood branches and willow whips give vines a leg up and then form roots for a running start on next year’s garden. Amaryllis serves up a major wallop of color and satisfaction. Giving that buxom bulb an anchored look is as simple as dropping a few wheatgrass seeds in its potting soil. Even outdoors, frost-hardy evergreens and berried plants carry through and step out, especially framed in a spirited container.