General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 9b -3.9 °C (25 °F) to -1.1 °C (30 °F)
Maximum recommended zone: Zone 11
Plant Height: 10 to 15 feet
Plant Spread: 10 to 12 feet
Flowers: Showy
Flower Color: Yellow
Bloom Size: 6"-12"
Flower Time: Late winter or early spring
Late summer or early fall
Late fall or early winter
Underground structures: Taproot
Uses: Windbreak or Hedge
Erosion control
Will Naturalize
Suitable for forage
Wildlife Attractant: Bees
Resistances: Humidity tolerant
Drought tolerant
Propagation: Other methods: Cuttings: Stem
Miscellaneous: Tolerates poor soil

Common names
  • Mexican Sunflower
  • Tree Marigold
  • Bolivian Sunflower
  • Marigold Tree

  • Posted by GoneTropical (Orlando, Florida - Zone 9b) on Jan 4, 2012 11:36 AM concerning plant:
    This plant is not for small spaces, it grows from a cutting to 10 ft in a matter of 4 months. Bees and butterflies love it, and the fragrance of the flowers reminds of honey.
    The twigs and branches are very brittle and the lower leaves look ragged with time. Still,
    having an abundance of cheerful daisy like flowers for your vase throughout summer and fall makes it
    worth having this plant in the yard.
  • Posted by dyzzypyxxy (Sarasota, Fl) on Apr 29, 2017 3:01 PM concerning plant:
    This Tithonia gets huge in coastal Florida. If not knocked back by cold weather, plants can be over 15ft tall and wide. They are not woody shrubs, though. The stems are brittle and break easily in high winds. They grow easily from cuttings as well as seeding themselves. An excellent plant for a quick privacy screen, because it does grow fast. But don't plant it if you want something small and delicate. Mine bloom twice a year, in April and again in November. Plants stay a nicer shape if cut back after each bloom cycle.
  • Posted by Marilyn (Kentucky - Zone 6a) on May 24, 2013 11:38 PM concerning plant:
    "Tithonia diversifolia is a species of flowering plant in the Asteraceae family that is commonly known as the tree marigold, Mexican tournesol, Mexican sunflower, Japanese sunflower or Nitobe chrysanthemum. It is native to eastern Mexico and Central America but has a nearly pantropical distribution as an introduced species. Depending on the area they may be either annual or perennial.

    Tithonia diversifolia is 2–3 m (6.6–9.8 ft) in height with upright and sometimes ligneous stalks in the form of woody shrubs. The large, showy flowers are yellow to orange colored and 5–15 cms. wide and 10–30 cms. long. Leaves are sub-ovate, serrate, acute, 10 to 40 cms. long, simply or mostly 3-7 lobed, somewhat glandular, and slightly grayish beneath. The seeds are achenes, 4-angled, and 5mm long. The seeds are spread by wind."

    Taken from wikipedia's page at:

Discussion Threads about this plant
Thread Title Last Reply Replies
Nice pic! by KFredenburg Apr 4, 2020 10:27 PM 6

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