Plants
Mexican Sunflower
Tithonia rotundifolia · Asteraceae
Mexican sunflower is the late-summer star for large beds: from July, countless velvety orange blooms open on bushy plants up to two metres tall, looking like small, refined sunflowers. Hardly any annual is visited as intensively by butterflies and bumblebees. With space and sun, tithonia delivers an orange firework until frost.
- Light
- Full sun — warmth and light directly determine the number of blooms.
- Watering
- Moderate and regular; established plants are surprisingly drought-proof.
- Care level
- Easy
- Botanical
- Tithonia rotundifolia
Tithonia is only distantly related to the familiar sunflower but shares its family and temperament: fast-growing, sun-hungry and warmth-loving. Its blooms are smaller at six to eight centimetres, but a well-grown plant carries dozens at once — on branched shoots rather than a single head.
The most widespread variety is Torch with bright orange-red blooms; Fiesta del Sol stays more compact at about 70 centimetres, and Yellow Torch flowers pure yellow. Characteristic are the velvety, softly padded stems — you can recognise tithonia by them even without a flower.
Its hour comes in late summer: while many summer flowers fade from August, Mexican sunflower only just gets going and blooms until the first frost. In the bed it fills exactly the gap between summer bedding and autumn asters — a trick we happily borrow from perennial border design.
For insects it is one of the best annual forage plants there is: the flat, open daisies with plentiful nectar are positively besieged by butterflies, bumblebees and wild bees. A sunny trio of tithonia hums louder in September than many a perennial bed.
Two requirements deserve respect: warmth and stability. Planted out before mid-May it stalls for weeks; and the tall, hollow stems snap easily in summer storms — a wind-sheltered spot or a discreet stake prevents this. Deadhead regularly to keep the supply of blooms coming.
As a cut flower tithonia is a bit of a diva: the hollow stems kink easily and should go into warm water straight after cutting. Then it lasts about five to eight days and brings an orange to the vase rarely found among classic cut flowers.
Is Mexican Sunflower toxic to children and pets?
- Children
- Non-toxic
- Cats
- Non-toxic
- Dogs
- Non-toxic
Mexican sunflower is considered non-toxic to cats, dogs and children. The rough, hairy leaves can lightly scratch sensitive skin, but no further caution is needed.
Overview: toxic & non-toxic plants for cats, dogs and children
Care
- 01Plant in full sun, warmth and shelter from wind where possible.
- 02Plant out only after the last late frosts in mid-May — cold stalls young plants for weeks.
- 03Water moderately but regularly; it tolerates short dry spells better than waterlogging.
- 04Feed every two weeks, less on rich soil.
- 05Stake tall varieties in good time, the hollow stems snap in wind.
- 06Deadhead regularly and it flowers until the first frost.
Frequently asked
- How tall does Mexican sunflower grow?
- The classic variety Torch reaches 150 to 200 centimetres on good soil and needs corresponding space at the back of the bed. For containers and smaller beds there are compact varieties like Fiesta del Sol, staying at around 70 centimetres.
- When does tithonia flower?
- From July until the first frost, peaking in August and September. That makes it a classic late-summer flower that takes over the bed when many other annuals are already fading. Regular deadheading noticeably extends the display.
- Is Mexican sunflower bee-friendly?
- It is among the best annual insect plants: the open, nectar-rich daisies attract butterflies, bumblebees and wild bees in large numbers — especially in late summer when food becomes scarcer. A clear recommendation for wildlife gardens.
- Does tithonia work as a cut flower?
- Yes, with one trick: the hollow stems kink easily, so we cut them early in the morning, place them straight into warm water and transport them upright. The bloom then lasts five to eight days and brings a rare velvety orange to the bouquet.