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Purple Waffle Plant

Strobilanthes alternata (stroh-bil-AN-theez al-ter-NAY-tuh)

Family: Acanthaceae Unknown Groundcover (<1 ft)

Strobilanthes alternata 'Exotica' is commonly called the waffle plant or the purple waffle plant. This cultivar features shiny purple leaves with a puckered "waffle" texture. It is a small, tender, herbaceous, tropical perennial in the Acanthaceae family that is grown for its colorful, textured foliage. In cooler climates, it is often grown as an annual or in a container. It may be used as ground cover; however, temperatures below 50 degrees will cause the plant to die. It is winter hardy in USDA Zones 10 to 11. Providing this plant with bright light will help the plant to retain its rich purple coloring. Direct sunlight will cause the leaf color to bleach or show signs of being sunburned. The white flowers are short-lived, but when in bloom they make a stunning contrast to the dark, purple foliage. Moderate pruning for cleaning up the plant may be required. Strobilanthes alternata is also known as Hemigraphis alternata. The genus name, Hemigraphis , is derived from two Greek words. Hemi means half, and graphis means brush which is interpreted as one-half of a brush. This refers to hair covering on the filaments of the stamens. The waffle plant makes a great showpiece when placed in the right container. Its purple leaves look great when planted in a clay pot or perhaps in a container with different shades of purple. Contrasting container colors, such as pink, blue, green, and yellow also add to the plant's beauty. Want plants that have a more bushy appearance? Pinch the stem tip off just above the leaves. This will allow the plant to focus on growing new foliage, giving a more full or bushy appearance. It will also slow down the stem's growth. Use the clippings to propagate additional plants. It's time to repot your plant when the roots begin to protrude from the drainage holes of your container. Quick ID Hints: low growing, 6 to 9 inches tall, and spreading ground cover glossy, puckered, waffled, reddish to purplish green leaves on the upper surface and red on the underside tiny white flower on terminal spikes Insects, Diseases, and Other Plant Problems: An occasional application of an insecticidal soap will prevent any insect issues from arising. Diseases that typically affect houseplants in general are scale, whiteflies, and root rot.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 49 attributes.

How it fits the guild

Guild layer 5 - Groundcover (<1 ft) Optimal soil pH Acid (<6.0); Neutral (6.0-8.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Full plant profile

Growing Conditions
Plant type
Annual; Ground Cover; Herbaceous Perennial; Houseplant
Life cycle
Annual; Perennial
USDA zones
10a, 10b, 11a, 11b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
High Organic Matter
Soil pH
Acid (<6.0); Neutral (6.0-8.0)
Soil drainage
Good Drainage | Moist
Available space
12 inches-3 feet
Mature size
Height: 0 ft. 6 in. - 0 ft. 9 in. | Width: 1 ft. 0 in. - 1 ft. 6 in.
Growth rate
Slow
Maintenance
Low
Canopy layer
5 - Groundcover (<1 ft)
Form & Appearance
Habit / form
Prostrate; Spreading
Texture
Medium
Leaf color
Green; Purple/Lavender; Red/Burgundy
Leaf type
Simple
Leaf arrangement
Opposite
Leaf shape
Ovate
Leaf margin
Crenate; Entire; Undulate
Leaf feel
Glossy
Leaf value
Showy
Leaf size
3-6 inches long
Hairs present
No
Leaf detail
The leaves are ovate, puckered, waffled, and glossy. The color is reddish to purplish-green, and the underside is red.
Flower color
White
Flower value
Showy
Flower form
Spike
Flower shape
Tubular
Flower size
< 1 inch
Flower detail
Tiny, tubular-shaped flowers in terminal spikes. Blooming in late spring to early summer.
Bloom time
Spring; Summer
Wildlife & Ecology
Native status
Unknown
Origin
Maluku Islands--eastern part of Indonesia
Distribution
Belize, Chad, El Salvador, Honduras, Malaya, Myanmar, Nicaragua, Panama, Philippines, Puerto Rico, Samoa, Thailand, Vietnam, and the United States
Play value
Colorful; Easy to Grow; Textural
Food & Medicine

Uses (ethnobotany)

Houseplant, groundcover

Landscape Use
Landscape location
Container; Hanging Baskets; Houseplants; Patio
Landscape theme
Cottage Garden; Rock Garden; Shade Garden; Water Garden
Design feature
Mass Planting; Specimen
Garden tags
#tropical herbaceous perennial #showy leaves #tender perennial #herbaceous perennial #showy flowers #dry soils tolerant #groundcover #drought tolerant #white flowers #purple leaves #hanging baskets #spreading #non-toxic for cats #non-toxic for horses #non-toxic for dogs #partial shade tolerant #container plant #tropical #terrarium #humidity tolerant #warm climates #evergreen #annual #long lived #houseplant
Problems & Resistance
Disease problems
Whiteflies Found on Flowers and Foliage
Resistant to
Drought; Dry Soil
Propagation
Leaf Cutting; Stem Cutting

Planted at Hunnicutt

Nobody’s planted this one yet.