Alonia™ Big Indigo Angelonia angustifolia

Alonia™ Big Indigo is a vigorous Angelonia angustifolia with upright spikes of dark indigo-blue to purple flowers and narrow green foliage. Danziger identifies it as an early-flowering, heat-tolerant ALONIA™ cultivar; its long flower spikes suit borders, containers, and cutting. ## Landscape Use Plant it in groups or as a vertical accent in mixed borders, sunny beds, or patio pots. Gertens lists a typical plant around 15 inches tall and wide, with flowering stems reaching about 20 inches; its exact size depends on the growing season and container conditions. The [Danziger profile](https://www.danzigeronline.com/catalog/annuals/alonia-big-indigo/) confirms its upright habit, large flowers, pollinator value, and pot and landscape uses. A [Gertens cultivar listing](https://www.gertens.com/angelonia-big-indigo) describes the deep purple-blue flowers and cut-flower use. ## Siting and Seasonal Display Choose a sunny position with fertile, well-drained soil. Angelonia performs well in summer heat and humidity; keep soil evenly moist while plants establish and avoid standing water. In warm regions it can behave as a tender perennial, while many gardeners grow it as a summer annual. The [North Carolina Extension Plant Toolbox](https://plants.ces.ncsu.edu/plants/angelonia-angustifolia/) describes the species’ summer bloom and need for drainage; [Oklahoma State Extension](https://extension.okstate.edu/programs/oklahoma-proven/plant-profiles/summer-snapdragon) recommends it for hot-season beds, borders, and containers. ## Breeder Danziger’s ALONIA™ series profile identifies this cultivar by name and notes early flowering, upright growth, large flowers, heat tolerance, pollinator value, and continued garden growth. ## Maintenance Water regularly during establishment and during extended dry periods; pots dry faster than garden beds. Routine deadheading is generally unnecessary. Remove frost-damaged growth when the seasonal display ends.