|
|
By Paul A. Thomas
University of Georgia
Like glowing beams of sunshine, Chartreuse Joseph’s Coat
(Alternanthera ficoidea ‘Chartreuse’) is a dazzling,
trouble-free addition to any landscape.
It’s prized for its eye-catching yellow-green foliage, compact
growth habit, durability and ability to provide nonstop color
from early spring until fall frost.
Joseph’s Coat is an heirloom plant that was popular in the
Victorian era when formal gardens were in vogue. Today there is
new interest in it, thanks to exciting new cultivars from Mexico
and South America, like Chartreuse.
Easy to grow
It’s a choice plant for today’s part-time gardener because it
provides season-long color with little routine care. It has
small, greenish-white flowers in leaf axils. But they’re usually
masked by the foliage and are indistinct.
The plants grow in a compact, mounded shape 6 to 12 inches tall
and 12 to 24 inches wide. The leaves are opposite and linear, a
half-inch to 1 inch long. Both stems and leaves are bright
yellow-green.
Chartreuse Joseph’s Coat is brightest when planted in full sun.
It will perform well, though, in morning sun and afternoon shade.
Moist, well-drained soils are essential. Like other annual
plants, it requires scheduled irrigation to keep looking its best.
Light pinching of the terminal shoot throughout the season will
keep it compact. In formal landscapes, plants are sometimes
sheared to provide a uniform shape.
By any other name
Chartreuse Joseph’s Coat is sometimes confused because it has
many common names: Golden Parrot Leaf, Golden Alternanthera,
Chartreuse Calico Plant. A yellow-green form of Summer Poinsettia
(Amaranthus) is called Joseph’s Coat, too. Landscapers call it
Chartreuse Alternanthera.
The plant has many landscape uses. It’s a favorite in formal knot
gardens or as edging to define plant beds. Theme parks, like
Disney World in Orlando, Fla., use it to create intricate,
eye-catching designs in the landscape.
Landscapers call Chartreuse Joseph’s Coat an “echo plant” because
it tends to enhance or echo other colors. It makes them look more
vibrant. That’s particularly true with magenta, purple or blue.
There’s more
It’s a favorite in container gardens, too, and in baskets where
it spills over the side like froth from a bubbling stream.
In formal beds where plants will be sheared as one unit for mass
effect, set plants 12 inches apart. In beds where the plants will
be seen as individuals, space them 18 to 24 inches apart.
Fertilize Chartreuse Joseph’s Coat with a complete, slow-release
fertilizer such as Osmocote 18-6-12 at planting time. Follow the
label directions. You shouldn’t need to fertilize again.
Adding 2 to 3 inches of a fine-textured mulch, such as pine straw
or pine-bark mininuggets, at planting will help keep the soil
more uniformly moist. Don’t be tempted to water every other day.
The plant can handle dry periods and even long-term drought with
infrequent watering.
(Paul Thomas is an Extension Service horticulturist with the
University of Georgia College of Agricultural and Environmental
Sciences.)
