Common Name: pricklyburr
Type: Herbaceous perennial
Family: Solanaceae
Native Range: Central America, Texas, Colombia
Zone: 9 to 10
Height: 2.00 to 3.00 feet
Spread: 3.00 to 6.00 feet
Bloom Time: July to frost
Bloom Description: Cream to pink to lavender
Sun: Full sun
Water: Medium
Maintenance: Low
Suggested Use: Annual
Flower: Showy, Fragrant
Leaf: Fragrant
Fruit: Showy
Tolerate: Drought
Culture
Winter hardy to USDA Zone 9-10. In St. Louis it is grown as an annual. In the ground, plants do best in rich, humusy, well-drained loams in full sun with regular moisture. Purchase plants from nurseries in spring or start seeds indoors about 6-8 weeks before last spring frost. Set plants out after last frost date. Plants tend to sprawl, and are best spaced about 3’ apart unless staking or other support will be used. Deadheading flowers is not necessary. Harvest ripe seed for planting in the following spring. Self-seeding may occur in the St. Louis area even though plants are not winter hardy. Container plants may be cut back and overwintered indoors in a sunny window.
Noteworthy Characteristics
Datura inoxia commonly called angel’s trumpet, is native to Mexico and Central America. It is a shrubby, sprawling, short-lived, tender perennial that is grown in St. Louis as an annual. It grows 2-3’ tall and sprawls to as much as 3-6’ wide. Ovate, wavy-margined, dark green leaves (to 8” long) have a downy texture. Single or double, upward-facing trumpets (to 7” long and 4” wide at the mouth) have a sweetly overpowering fragrance. Flowers are cream to pink to lavender, and last one night. Each flower will unravel in the evening to reveal a fragrant trumpet-shaped bloom that only lasts until noon the following day. Flowers will bloom intermittently from mid-summer to frost. Flowers are followed by downy spherical fruit covered with stiff spines, hence the sometimes used common name of downy thorn apple for this plant. Plants belong to the nightshade family and all parts are extremely toxic. Datura is similar to Brugmansia, except the trumpets of the latter are larger, last for several days and droop downward. Nomenclature for plants in the genus Datura is confusing.
Genus name comes from an Indian vernacular name.
Problems
No serious insect or disease problems. Watch for whiteflies, mealy bugs and spider mites.
Uses
Borders, containers. Specimen or group. Place containers near patios so flower fragrance may be enjoyed.