Stalks of dark blue and blue flowers emerge from striking black stems amidst green foliage. A real show-stopper that thrives in high heat and humidity making it a must-have annual for a Mediterranean-style garden. Will behave as a perennial in warm winter regions.
Thrives in loose, organically rich, moist, well-drained soil. Water deeply, regularly to establish root system; once established, reduce frequency. Remove spent flower spikes to encourage prolific continuous bloom. Where grown as a perennial, cut back to 3 in. above soil line and fertilize before growth emerges in early spring.