annual

Common Sunflower

Helianthus annuus

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Annual

Height

72 inches

Width

12 inches

Light

Full Sun

Water

Moderate

Humidity

Average

Lifespan

Annual

Native To

North America

Toxicity

Non-toxic

The Story

Plant Bio

Sunflowers are known for their tall stems and large, daisy-like flower heads. They typically follow the sun as it moves across the sky. Helianthus annuus is notable for its ability to produce edible seeds and is often used for ornamental purposes in gardens.

Bloom Period:

EarlyLate

Uses & Benefits:

Helianthus annuus adds height and vibrant color to gardens, attracting pollinators and creating a cheerful focal point.

Seeds are edible and nutritious, providing a source of healthy fats and proteins.

Supports bees, butterflies, and other pollinators, promoting biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck sunflower seeds 1 inch deep into well-drained soil in full sun.
Water regularly to keep soil moist but not waterlogged during germination.
Thin seedlings to 12-18 inches apart once established for optimal growth.
Support tall varieties with stakes as they grow taller.
Fertilize monthly with a balanced fertilizer during the growing season.
Harvest mature flowers when the backs turn yellow and the petals start to fade.

Pro Tip

Plant in a sunny spot with rich, well-draining soil for best blooms.

Keep It Thriving

Care Guide

Do

Water deeply once a week during dry spells 💧
Provide support for tall varieties to prevent lodging
Deadhead faded flowers to encourage more blooms
Apply a balanced fertilizer monthly during peak growth

Don't

Avoid overwatering to prevent root rot ❌
Do not plant in shady areas, as sun is essential
Refrain from disturbing roots when mulching
Don't forget to stake tall varieties to prevent wind damage

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bright, cheerful borderTall focal point in flower bedsWildflower meadow accent

Companion Plants

Corn Zinnia Cosmos Marigold Sunflower

Multiply

Propagation Methods

Good to Know

Common Questions

Common Sunflower questions

What zones can Common Sunflower grow in?

Common 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 Common Sunflower deer resistant?

Not reliably. Deer may browse Common Sunflower, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Common Sunflower bloom?

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

Does Common Sunflower need full sun?

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

Is Common Sunflower drought tolerant?

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