Photo by Melody

PlantFiles: Mexican Sunflower
Tithonia rotundifolia 'Aztec Sun'

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Tithonia (ti-THO-nee-a) (Info)
Species: rotundifolia (ro-tun-dih-FOH-lee-uh) (Info)
Cultivar: Aztec Sun

7 members have or want this plant for trade.


4-6 ft. (1.2-1.8 m)

36-48 in. (90-120 cm)

Not Applicable

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
Gold (Yellow-Orange)

Bloom Time:
Late Summer/Early Fall


Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
This plant is resistant to deer
Flowers are good for cutting

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
From seed; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Wear gloves to protect hands when handling seeds
Properly cleaned, seed can be successfully stored

Click thumbnail
to view:

By LilyLover_UT
Thumbnail #1 of Tithonia rotundifolia by LilyLover_UT

By slcdms
Thumbnail #2 of Tithonia rotundifolia by slcdms

By wormfood
Thumbnail #3 of Tithonia rotundifolia by wormfood


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive Rimor On Mar 20, 2008, Rimor from Stuart, FL wrote:

I have seen this plant in huge clusters and rows, growing to 15' or more, covered with blossoms, in St. Lucie and Martin Counties, South Florida. I have planted Tithonia r. from cuttings recently in my own yard and they are doing well. I believe this plant is perennial in this area, which has very warm winters.


This plant has been said to grow in the following regions:

Melbourne, Florida
Stuart, Florida
Derby, Kansas
Ripley, Mississippi
Vass, North Carolina
Dover, Ohio

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