A true workhorse for the Willis and Houston metro area, 'Indigo Spires' is a hybrid prized for its non-stop production of 12-14 inch flower spikes. It is a large, fast-growing perennial that provides an architectural "wow" factor in the back of the border. It thrives in our Texas humidity and is a primary destination for bees, butterflies, and hummingbirds. To ensure success in local clay, plant in a sunny spot with good drainage; it can become quite large, so give it plenty of room to spread.
Exposure
Full Sun (Required for strong stems and maximum bloom production)
Height x Width
3-5 ft. Tall x 3-5 ft. Wide
Water
Moderate; once established it is quite drought-tolerant, but it performs best with regular watering during the peak of Houston's dry summer weeks.
Zones
8 - 11 (Root-hardy perennial in Southeast Texas)
Fertilization
Apply a balanced, slow-release fertilizer in early spring to fuel its vigorous growth.
Pruning
Deadhead spent flower spikes to encourage continuous blooming. Cut the entire plant back to a few inches above the ground in late winter after the last freeze.
A true workhorse for the Willis and Houston metro area, 'Indigo Spires' is a hybrid prized for its non-stop production of 12-14 inch flower spikes. It is a large, fast-growing perennial that provides an architectural "wow" factor in the back of the border. It thrives in our Texas humidity and is a primary destination for bees, butterflies, and hummingbirds. To ensure success in local clay, plant in a sunny spot with good drainage; it can become quite large, so give it plenty of room to spread.
Exposure
Full Sun (Required for strong stems and maximum bloom production)
Height x Width
3-5 ft. Tall x 3-5 ft. Wide
Water
Moderate; once established it is quite drought-tolerant, but it performs best with regular watering during the peak of Houston's dry summer weeks.
Zones
8 - 11 (Root-hardy perennial in Southeast Texas)
Fertilization
Apply a balanced, slow-release fertilizer in early spring to fuel its vigorous growth.
Pruning
Deadhead spent flower spikes to encourage continuous blooming. Cut the entire plant back to a few inches above the ground in late winter after the last freeze.
