Growing Guide
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Annual Flower

Also known as Mexican Sunflower
Tithonia rotundifolia
Asteraceae Family
Synonym: Tithonia speciosa

These tall, upright plants are much like sunflowers, and bear brightly colored blooms in shades of orange, yellow, and red.

Site Characteristics
  • full sun

Soil conditions:

  • requires well-drained soil
  • tolerates low fertility
Perform best in poor soil. Does not flower well in rich soil.

Special locations:

  • xeriscapes
Plant Traits

Lifecycle: annual

Ease-of-care: easy

Height: 3 to 6 feet

Spread: 1 to 1.5 feet

Bloom time:

  • mid-summer
  • late summer
  • early fall
  • mid-fall

Flower color:

  • red
  • orange
  • yellow

Foliage color:

  • medium green
  • dark green

Foliage texture: medium

Shape: upright

Shape in flower: same as above

Special Considerations
  • heat
Special characteristics:
  • non-aggressive
  • non-invasive
  • not native to North America - Native to Mexico to South America.
  • butterflies
  • hummingbirds
Special uses:
  • cut flowers
  • direct-seeding
Growing Information
How to plant:

Propagate by seed - Sow seeds outdoors in the spring where desired after frost danger has passed, or indoors 6 to 8 weeks before the last frost. Do not cover, as light aids germination.

Germination temperature: 70 F

Days to emergence: 4 to 10

Maintenance and care:
May require staking. Deadhead to prolong bloom.

More growing information: How to Grow Annuals

‘Arcadian Blend’: 2 to 2 ½’ tall plants with 3” wide orange, yellow, or red flowers.

‘Goldfinger’: 2 to 2 ½’ tall plants with orange-gold, 3” wide flowers.