annualN. America Native

Mexican Sunflower

Tithonia rotundifolia

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Annual

Height

60 inches

Width

30 inches

Light

Full Sun

Water

Moderate, prefers evenly moist soil

Humidity

Prefers dry to moderate humidity

Lifespan

Annual

Native To

Mexico and Central America

Toxicity

Non-toxic to humans and pets

The Story

Plant Bio

Tithonia rotundifolia, commonly known as Mexican sunflower, is an annual plant known for its vibrant orange flowers and ability to thrive in hot, sunny gardens. It is particularly attractive to pollinators and is used in wildlife gardens.

Uses & Benefits:

Tithonia rotundifolia provides vibrant orange blooms that attract pollinators and add color to gardens.

Its annual growth habit makes it easy to manage and replace each season.

Supports bees, butterflies, and other pollinators, enhancing local biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Select a sunny location with well-draining soil for planting.
Tuck seeds into the soil surface and water lightly to keep moist.
Maintain consistent watering during early growth for strong establishment.
Fertilize with a balanced fertilizer every 4-6 weeks during the growing season.
Prune back after initial flowering to encourage bushier growth.
Mulch around plants to retain moisture and suppress weeds.

Pro Tip

Start seeds indoors 4-6 weeks before the last frost for earlier blooms.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil evenly moist 🌱
Deadhead spent flowers to promote continuous blooming
Apply a balanced fertilizer during the growing season
Provide full sun for optimal growth

Don't

Avoid overwatering to prevent root rot ❌
Do not neglect pruning, which encourages healthy growth
Refrain from planting in poorly drained soil
Avoid excessive fertilization which can cause legginess

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Pinch
Plant
Stake

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bright, cheerful border plantWildflower meadow accentPollinator-friendly garden feature

Companion Plants

Sunflowers Black-eyed Susans Liatris Gaillardia Coreopsis

Multiply

Propagation Methods

Good to Know

Common Questions

Mexican Sunflower questions

What zones can Mexican Sunflower grow in?

Mexican Sunflower is hardy in USDA Zone 10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Mexican Sunflower deer resistant?

Yes — Mexican Sunflower is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Mexican Sunflower bloom?

Mexican Sunflower typically blooms in mid-summer to fall through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Mexican Sunflower need full sun?

Mexican Sunflower does best in full sun (6+ hours).

Is Mexican Sunflower drought tolerant?

Yes — once established (usually after the first full season), Mexican Sunflower handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.