Thyrsacanthus Species, Firespike, Purple Firespike, Purple Flame

Thyrsacanthuscallistachyus

Family
Acanthaceae (ah-kanth-AY-see-ee)
Species
callistachyus (kal-lis-STAY-kee-us)
Synonym
Odontonema callistachyum
Sun Exposure
Sun to Partial Shade
Light Shade
Partial to Full Shade
Foliage
Grown for foliage
Herbaceous
Smooth
Height
36-48 in. (90-120 cm)
Spacing
24-36 in. (60-90 cm)
Hardiness
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)
Danger
N/A
Bloom Color
Magenta (pink-purple)
Fuchsia (red-purple)
Lavender
Medium Purple
Bloom Time
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall
Late Fall/Early Winter
Mid Winter
Blooms all year
Blooms repeatedly
Other Details
Category
Tropicals and Tender Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
From softwood cuttings
From seed; direct sow after last frost
Seed Collecting
Regional

This plant is said to grow outdoors in the following regions:

Sacramento, California

Brooksville, Florida

Clermont, Florida

Daytona Beach, Florida

Deland, Florida

Delray Beach, Florida

Fort Lauderdale, Florida(2 reports)

Gainesville, Florida

Groveland, Florida

Key West, Florida

Lake Mary, Florida

Lakeland, Florida

Lutz, Florida

Lynn Haven, Florida

Melbourne, Florida

Miami, Florida

New Port Richey, Florida

Ocala, Florida

Odessa, Florida

Orange Park, Florida

Riverview, Florida

Saint Petersburg, Florida

Sarasota, Florida(2 reports)

Tampa, Florida(2 reports)

Titusville, Florida

West Palm Beach, Florida

Winter Springs, Florida

Baton Rouge, Louisiana

Lafayette, Louisiana

Mandeville, Louisiana

Youngsville, Louisiana

Hattiesburg, Mississippi

Blythewood, South Carolina

Saint Helena Island, South Carolina

Angleton, Texas

Austin, Texas

Boerne, Texas

Brenham, Texas

Houston, Texas

Oakhurst, Texas

Portland, Texas

Richmond, Texas

San Antonio, Texas

Shepherd, Texas

Spring, Texas

show all

Featured Videos

Gardener's Notes:

4
positives
2
neutrals
0
negative
Sort By:
Sort By:
S
Winter Springs, FL (Zone 9b) | June 2015 | positive

I've had my plant for a few seasons now. Mine is in a mostly shaded area but does get some good morning and very late afternoon sun. It d...Read More

G
Orange City, FL | March 2015 | positive

Purple Firespike grows well in Orange City, zone 9b. Easy to start from cuttings. Not good for cut flowers because the petals fall.

V
(Zone 8a) | December 2013 | neutral

P)planted in bright shade in my garden. After 2 years, it has yet to bloom.

R
R
Mandeville, LA | February 2013 | neutral

Very stalky grower. Has exceeded 6 feet in my garden. I have two plants, one in deep shade, the other in filtered sun all day. The one in...Read More

H
Odessa, FL (Zone 9b) | July 2007 | positive

This is a very vigorous plant. I started from a cutting and in just two years, it is 8 feet across and 10 feet tall. It is almost alway...Read More

H
H
San Antonio, TX (Zone 8b) | January 2004 | positive

San Antonio, Tx.
This plant, native to Mexico and Central America, solves the problem of having a shady area where very few plants...Read More

Featured
(Mimaglossa nauplialis)
Sandhill Crane
(Grus canadensis)
Featured
(Mimaglossa nauplialis)
Sandhill Crane
(Grus canadensis)