By Bodie V. Pennisi
University of Georgia

Tropical plants aren’t just your houseplants anymore. Landscaping
with tropical plants has become increasingly popular.

Growers and landscapers are becoming more savvy, too, in catering
to this spirit of landscape adventure. We’re now seeing large,
bold leaves and tropical textures in most garden settings.
Flowers are taking a step back, leaving us to focus on the
foliage instead and to explore variations such as texture and
color.

At the University of Georgia in Griffin, we’re continuing our
quest to investigate the landscape performance of new tropical
species and cultivars. We’re raising the public awareness, too,
of the alternative uses of tropical plants in the landscape.

We’re also evaluating plant hardiness in our area, in U.S.
Department of Agriculture hardiness zone 7b (with minimum
temperature averages of 5 to 10 degrees Fahrenheit).

Full sun or partial shade

Here are some winners from our garden. These are all great as
tall background or specimen plants and have been hardy in Griffin
for the past three years. They grow best in full sun or in
morning and afternoon shade with midday sun.

Alocasia ‘Williams hybrid’
grows 42-44 inches high, with medium green foliage undulated with
prominent veins and flowers through the summer. The stems grow
thicker in full sun. This is a very strong performer with
impressive landscape impact.

Colocasia nancyana grows
36-40 inches tall. Its green foliage has a creamy yellow,
variegated center and veins. It has strong growth with good
impact. Its stems grow thicker and it suckers more (produces more
offshoots) in full sun.

Colocasia esculenta ‘Red
Stem’ grows 34-38 inches tall with medium green leaves
with reddish petioles. It’s a strong plant with good impact with
its attractive red leaf petioles. It, too, has increased stem
thickness and suckering in full sun.

Curcuma ‘Aussie Plume’ and
‘Giant Plume’ grow 34-38
inches tall with medium green leaves. It has bright pink bracts
and yellow flowers, too, throughout the summer and fall. It’s a
vigorous performer with strong landscape impact. And it’s great
for cut flowers.

Curcuma ‘Emperor’ grows
36-40 inches tall with medium green leaves with white margins. It
produces white flowers throughout summer and fall. A strong
performer, it has excellent landscape impact and is also great
for cut flowers.

Plants for full shade

Here are some species more suitable for full shade:

Cornukaempferia ‘Jungle
Gold’ is best used as a groundcover or mass planting.
It grows 6-8 inches tall with round, velvety leaves with silver
spots on a dark background. With orange flowers, too, it makes an
impressive impact in the landscape and is a strong performer.

Kaempferia ‘Alva’ grows 6-8
inches tall, too, and is also best as a groundcover or in a mass
planting. Its leaves are oval, medium green with brown spots.
Another strong performer, its pale lavender flowers add to its
landscape impact all season long.

Kaempferia ‘Grande’ grows
16-20 inches tall and is best used as specimen plants or in mass
plantings. Its oval, silver-spotted leaves grow on long petioles
and make an impressive landscape impact. It’s a strong performer.

Kaempferia pulchra ‘Raven’
grows 18-24 inches tall and is best used much as Kaempferia
‘Grande’ is. It doesn’t have flowers, but its lance-shaped purple
and silver-spotted leaves on long petioles produce an impressive
landscape impact. It performs well in the landscape.

(Bodie Pennisi is a Cooperative Extension floriculture
specialist with the University of Georgia College of Agricultural
and Environmental Sciences.)