Thyrsacanthus callistachyus (Fire Spike)

Thyrsacanthus callistachyus (Fire Spike) magenta flower, close up of the long tubular petals on stem.
Thyrsacanthus callistachyus (Fire Spike) with long magenta petals reaching upward from deep green lush foliage.

Botanical names: Thyrsacanthus callistachyus, Odontonema callistachyum

Common name: Fire Spike

Family: Acanthaceae

Origin: Central America

USDA Plant Hardiness Map

USDA Zone: 8-11

Large shrub 5-10 ft tallPlant form: Large bush
Plant mature sizeMature height: 5-10 ft
Full sunSemi-shadeShadeSun exposure: Full sun or bright light indoor; semi-shade; shade
Cold toleranceCold tolerance: Frost sensitive. Protect from freezing.
Watering: Regular. Let topsoil dry slightlyWatering: Regular
Pink flowersFlower color: Pink
Suitable forSuitable for: Outdoors in the suitable USDA zone; small gardens, containers, and indoor growing
Plant attracts butterflies, hummingbirdsWildlife: Attracts butterflies and hummingbirds

Firespike likes moist but well-drained soil. Once established it can tolerate all but the longest droughts. Softwood cuttings are very easy to root, and they will bloom in their first year. Specimen plant. Hummingbirds love it.

Odontonema callistachyum is similar to Odontonema cuspidatum.

Similar plants: Thyrsacanthus callistachyus (Fire Spike)


Image gallery: 7 images
Thyrsacanthus callistachyus (Fire Spike) magenta flower spikes emerging above lush dark green foliage close up
Thyrsacanthus callistachyus (Fire Spike) magenta flower spikes stand tall among the thick green leaves.
Thyrsacanthus callistachyus (Fire Spike) with purple flower spikes and lush green leaves plant.
Thyrsacanthus callistachyus (Fire Spike) with vertical purple flower spikes rising above dense green foliage.
Thyrsacanthus callistachyus pink flower cluster close up with dark green textured leaves
Thyrsacanthus callistachyus with vibrant pink tubular flowers on a dark stem
Thyrsacanthus callistachyus (Fire Spike) magenta flower close up with green leaves attached to stem
Thyrsacanthus callistachyus (Fire Spike) magenta flower spikes emerging from wide dark green oval foliage
Thyrsacanthus callistachyus (Fire Spike) plant with tall pink flowers and large green leaves.
Thyrsacanthus callistachyus (Fire Spike) plant with upright pink flowers and wide green foliage on stems.
Thyrsacanthus callistachyus (Fire Spike) pink flower spikes rising above lush green foliage close up.
Thyrsacanthus callistachyus (Fire Spike) vertical pink flower clusters emerging from dense leafy stems.
Thyrsacanthus callistachyus (Fire Spike) purple flower stalks rising among green leaves in close up
Thyrsacanthus callistachyus (Fire Spike) showing slender purple flower stalks rising among deep green foliage.


Link to this plant:
https://toptropicals.com/catalog/uid/odontonema_callistachyum.htm
Thyrsacanthus callistachyus (Fire Spike) magenta flower spikes emerging above lush dark green foliage close up

2960 Odontonema callistachyum - Lavender Butterfly Bush

Showy bright lavender flowers, butterfly attractor. Takes sun or shade.
See Planting Guide & Care Tips


Recommended Fertilizer: SUNSHINE Megaflor - Bloom Nutrition Booster
Grown in
10"/3 gal pot
3 Plants in stock
$29.95

Find more Thyrsacanthus items from the online store
About Tropical Plant Encyclopedia · Pictogram Guide·