Setcreasea pallida 'Purple Heart'

The old-fashioned shamrock house­plant is now high fashion. Several introductions from Proven Winners push this group to the fore for its elegant foliage; abundant, delicate flowers; and vigor. Only 6 to 10 inches high with a spread to 12 inches, this plant’s tiny, ¾-inch-wide, bronze-colored leaf clusters and bright yellow flowers are massed on trailing stems that spill over the sides of shaded window boxes and containers.

The variously shaped leaves of these popular bedding plants typically combine several colors, such as chartreuse, rust red, cream, and purple-black. Some cultivars sport almost all of these colors combined. The darker the red in the leaf, the more sun the plant will tolerate.

Coleus are tender tropicals that are generally grown as annuals because they are hardy only in Zone 11. They are easy to grow, reliable plants known for their colorful foliage that comes in many color combinations and mixes well with other garden plants. Blue to white nettle-like flowers bloom in racemes in summer, but are not showy and tend to detract visually from the attractiveness of the plants.

As basic as a black dress, 15-inch-tall ‘Red Trailing Queen’ bedecks herself from leaf to stem in regal burgundy. Her simple oval leaf shape and straightforward color complement most shades, except blue and true purple. The subtle strength of the coleus’s burgundy foliage strikes a balance with soft pinks or pale yellows as well as bright fuchsias or bold oranges.

‘Meandering Linda’, a close cousin of  Solenostemon ‘Red Trailing Queen’, grows 16 inches tall and bears crinkly, chocolate-purple leaves banded in rich raspberry-pink, with touches of cream along the edges. It makes a scrumptious duo with anything silver, especially the elegant silver-white foliage of dusty miller (Centaurea cineraria ‘Colchester White’, Zones 7–11). ‘Meandering Linda’ appears to be a sport of ‘Red Trailing Queen’, and if planted in less than half-day sun, it sometimes reverts to its plain burgundy form.