Pronounciation: Di-AN-thus del-TOY-dez
Sunset All zones
USDA All zones
Landscape Use: Edging plant for landscape borders, colorful when planted in mass in flower beds, patio containers or hanging baskets.
Form & Character: Hardy herbaceous perennial grown as cool season annual in Phoenix, bright, warm and cheery.
Growth Habit: Low, mounding, 12 to 16 inches in height.
Foliage/texture: Green to gray-green, linear to lanceolate leaves to 2 to 3 inches, sessile; fine texture.
Flowers & fruits: Terminal clusters of rounded flowers w/ splayed margins, many colors and bicolors, fruit inconspicuous.
Seasonal color: Winter and Spring, purple, red, pinks, and white, bi-colors.
Temperature: Prefers temperatures between 25oF and 90oF which means in Phoenix that one sets plants out in late September and can rely on them for a good show of color until late April or early May in Phoenix.
Light: Full sun
Soil: Well drained w/ ample organic matter is best so as to maintain high fertility and good water holding capacity, in other words....a good garden soil!
Watering: Apply regular water at all times even in winter
Disease and pests: None
Additional comments: One of the most consistent cool season bedding plants for the Phoenix area. Set out transplants in early October at about 6 to 8 inches on center. D. deltoides used in combination with Lobelia erinus make a wonderful color combination for residential and commercial entryways during the Phoenix cool season of late October to mid April. D. deltoides sometimes reseeds and might survive until July in Phoenix if planted in an eastern exposure location with copious mid-day and afternoon shade. There are a plethora of cultivars of many single and multi-colors, new ones are introduced each year.
Noteworthy cultivars examples:
'Vampire' (deep red)
'Zing rose' (scarlet red)