General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 9a -6.7 °C (20 °F) to -3.9 °C (25 °F)
Maximum recommended zone: Zone 11
Plant Height: 2 to 3 feet
Plant Spread: 3 to 4 feet
Fruit: Other: Fruits are approximately 1 1/4 inches long and contain numerous round, flat brownish-black seeds.
Flowers: Showy
Flower Color: Yellow
Other: Double yellow.
Bloom Size: 6"-12"
Flower Time: Late spring or early summer
Late summer or early fall
Underground structures: Taproot
Wildlife Attractant: Bees
Resistances: Humidity tolerant
Drought tolerant
Toxicity: Other: All parts of the plant are extremely toxic.
Propagation: Seeds: Days to germinate: 2 to 3 weeks.
Depth to plant seed: Sow approximately 1/8 inch deep.
Pollinators: Various insects
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots

Common names
  • Devil's Trumpet
  • Horn of Plenty
  • Downy Thorn Apple

  • Posted by tabbycat (Youngsville, LA - Zone 9b) on Jul 18, 2018 9:00 PM concerning plant:
    It's July 18, 2018, and one of my plants has its first flower and 3 buds here in zone 9. On March 1st I sowed the seeds I got in the Nov. 2017 seed swap here on The plant is 24 inches tall and 12 inches across. It grows in a large pot in morning through midday sun. I have another just like it that is the same size and has 3 buds that should open in a couple of days. The pretty flower seems to have triple layers and is the palest yellow. I'm delighted!

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