Species

Dahlia coccineaRed Dahlia

2 other cultivars

perennialN. America Native

Scarlet Dahlia

Dahlia coccinea 'True Wild Form'

The Story

Plant Bio

Dahlia coccinea is a native species characterized by its bright orange flowers and attractive foliage, often used in wildflower gardens.

This cultivar represents the true wild form of Dahlia coccinea, maintaining authentic traits and characteristics distinct from cultivated varieties.

Uses & Benefits:

Vivid red flowers create striking garden accents, attracting hummingbirds and butterflies.

Tuber division allows for easy propagation and sharing among gardeners.

Supports pollinators and enhances biodiversity in flower borders.

SpeciesDahlia coccineaRed Dahlia

Essentials

At a Glance

Plant Type

Perennial

Height

36"

Width

24"

Light

Full Sun, Partial Sun

Zones

8, 9, 10

Water

Moderate

Humidity

Moderate

Lifespan

Tender perennial

Native To

Mexico

Toxicity

Toxic to dogs and cats

Bloom period

Mid-summer – Late summer

In flower about 2 months of the year

Planting

How to Grow

Choose a sunny location with well-draining soil for planting.
Tuck seeds or tubers about 4 inches deep in early spring after the last frost.
Water thoroughly after planting to settle the soil around the roots.
Maintain consistent moisture, especially during dry spells in summer.
Fertilize monthly with a balanced, water-soluble fertilizer during the growing season.
Pinch back the stems early to encourage bushier growth and more blooms.

Pro Tip

Mulch around plants to retain moisture and suppress weeds, especially during hot months.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist but not waterlogged 🌱
Deadhead spent blooms to promote continuous flowering
Fertilize monthly during the growing season for optimal growth
Provide staking or support for tall varieties to prevent toppling

Don't

Avoid overwatering, which can cause root rot ❌
Don’t disturb the tubers during the growing season
Refrain from fertilizing late in the season to prevent weak growth
Don’t plant in heavy, poorly-drained clay soil without amendments

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bright flower border with vivid red bloomsWildflower meadow accentVivid container display for patios

Companion Plants

Marigolds Zinnias Salvia Cosmos Nicotiana

Multiply

Propagation Methods

Good to Know

Common Questions

Scarlet Dahlia questions

What zones can Scarlet Dahlia grow in?

Scarlet Dahlia is hardy in USDA Zones 8–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Scarlet Dahlia deer resistant?

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

When does Scarlet Dahlia bloom?

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

Does Scarlet Dahlia need full sun?

Scarlet Dahlia does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.