Alphabetical Plant Listing

Tithonia rotundifolia (Mexican Sunflower)

Mexican Sunflower, Goldflower of the Incas, Mexican Marigold, Tithonia Speciosa


Thriving in summer heat, Mexican Sunflower (Tithonia rotundifolia) is a warm weather annual featuring showy daisy flowers, up to 3 in. across (7 cm), in shades of brilliant orange and yellow from midsummer until fall. Very attractive and eye-catching, with abundant and joyful blossoms for weeks, this vigorous annual plant creates a striking visual impact in the garden. Fabulous looking when combined with the blues of Mealy-Cup sage (Salvia farinacea) or the purples of Tall Verbena (Verbena bonariensis), it is spectacular at the back of borders where it will steal the show!

  • Fairly pest-free and low maintenance, add this charming and graceful plant to the landscape and you will be rewarded with abundant happy butterflies and hummingbirds!
  • Vigorously growing up to 4-6 ft. high (120-180 cm) and spreading up to 2-3ft. (60-90 cm), this bushy plant features large leaves, heart-shaped to lobed and covered with soft hair that deer ignore. Mexican Flower is an ideal addition to beds and borderscottage gardens, gravel gardens and cutting gardens, as it makes excellent fresh cut flowers.
  • Performs best in full sun, in averagedry to medium moisturewell-drained soilsDry and poor soils are tolerated, but rich, fertile soils should be avoided as the plant may develop excess foliage. Do not over fertilize as it will promote foliage more than flowers and may also cause the plants to topple. This plant is heatdrought tolerant.
  • May be grown from seeds or live plants. Sow seeds outdoors after all danger of frost has passed or indoors 6-8 weeks prior to the last spring frost date.
  • Pinching off dead blossoms will promote continuous blooming. Staking may be required.
  • The most popular Mexican Sunflower varieties are:
    Tithonia 'Fiesta del Sol' - dwarf cultivar reaching 2-3 ft. height (60-90 cm) with single, orange daisy flowers, 2-3 in. across (5-7 cm). Heat and humidity resistant. 2000 All America Selections Winner
    Tithonia 'Torch' - cultivar reaching 3-4 ft. height (90-120 cm) with single, orange-scarlet daisy flowers,3-4 in. across (7-9 cm).

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Requirements

Hardiness 2 – 11
Heat Zones 1 – 12
Climate Zones 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, A1, A2, A3, H1, H2
Plant Type Annuals
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 4' – 6' (120cm – 180cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 24" – 36" (60cm – 90cm)
Water Needs Low
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Cut Flowers, Showy
Tolerance Deer, Drought, Dry Soil
Attracts Butterflies, Hummingbirds
Garden Uses Beds and Borders
Garden Styles Cutting Garden, Gravel and Rock Garden, Informal and Cottage

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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 2 – 11
Heat Zones 1 – 12
Climate Zones 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, A1, A2, A3, H1, H2
Plant Type Annuals
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 4' – 6' (120cm – 180cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 24" – 36" (60cm – 90cm)
Water Needs Low
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Cut Flowers, Showy
Tolerance Deer, Drought, Dry Soil
Attracts Butterflies, Hummingbirds
Garden Uses Beds and Borders
Garden Styles Cutting Garden, Gravel and Rock Garden, Informal and Cottage

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