Prune three times a year and fertilize 3 times a year too. They can be planted between other shrubs so the side branches grow up instead of flopping down, and this will also protect them from cold and frost.1
These estimates for how long Firespike takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.
Average days | Min days | Max days (0)
Average days | Min days | Max days (0)
Average days | Min days | Max days (0)
Odontonema tubiforme (Bertol.) Kuntze, Odontonema strictum
1 http://gardeningsolutions.ifas.ufl.edu/plants/ornamentals/firespike.html