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Products > Odontonema callistachyum
 
Odontonema callistachyum - Purple Firespike

Note: This plant is not currently for sale. This is an archive page preserved for informational use.  
Image of Odontonema callistachyum
[2nd Image]
Habit and Cultural Information
Category: Shrub
Family: Acanthaceae (Acanthus¹)
Origin: Mexico (North America)
Evergreen: Yes
Flower Color: Fuchsia Pink
Bloomtime: Year-round
Synonyms: [Justicia callistachya]
Height: 6-10 feet
Width: 4-6 feet
Exposure: Sun or Shade
Irrigation (H2O Info): Medium Water Needs
Winter Hardiness: 15-20° F
Odontonema callistachyum (Purple Firespike) - An upright evergreen shrub that grows to 6 to 8+ feet tall with lush deep green foliage and terminal spikes of lavender-purple flowers that appear summer through late winter to year-round.

Plant in shade to full coastal sun where it tolerates most soils. Water occasionally to regularly. This plant is typically evergreen in our coastal California climate but can be cut to the ground by a hard frost, reemerging in spring to rebound and bloom in the summer. From reports it seems root hardy to around 15 F so it can be grown as a tropical perennial that reaches to 4 feet tall in colder locations or as a summer annual anywhere. It is attractive to hummingbirds.

Odontonema callistachyum is native to Mexico and Central America. The name for the genus is from the Greek words 'odonto' meaning teeth and 'nema' meaning "thread" in reference to the stamens having toothed filaments. The specific epithet in a combination of the Latin word 'callos' or 'calli' meaning beautiful and the Greek word 'stachys' meaning a "spike" or an "ear of corn" in reference to the beautiful spikes of flowers of this species. 

The information about Odontonema callistachyum that is displayed on this web page is based on research conducted in our nursery's horticultural library and from reliable online resources. We will also include observations made about this plant as it grows in our nursery gardens and other gardens that we have visited, as well how the crops have performed in containers in our nursery field. We also incorporate comments that we receive from others and welcome hearing from anyone with additional information, particularly if they share cultural information that aids others growing this plant.

 
San Marcos Growers, established in 1979, will close at the end of 2025 so that the property can be developed for affordable housing.