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Tithonia rotundifolia

Mexican sunflower

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Key information

Plant type

Half-hardy annual

Flower colour





Half hardy

Skill level


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Plant details

Though not as commonly grown as some summer bedding plants such as petunias or marigolds, the Mexican sunflower is a useful plant for adding height to displays, standing up to 1.8m (6ft) tall. The bright orange flowers appear from late summer to early autumn and last well when cut for the vase. Grow seed at 13C to 18C (55C to 64F) in mid- to late spring. Wait until after the danger of frosts has passed before planting out in a sunny, well-drained spot in the garden. Protect plants from slugs and snails.

Family: Asteraceae

Genus: Tithonia

Species: rotundifolia

Plant type: Half-hardy annual

Flower colour: Orange

Foliage colour: Mid-green

Feature: Flowers

Sun exposure: Full sun

Soil: Well-drained/light

Hardiness: Half hardy

Skill level: Experienced

Height: 180cm

Spread: 30cm

Time to plant seeds: April to May

Time to plant: May to June

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Boleybeg Gardener

Skill level: What skills are required to have success with growing Tithonia

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