5 named cultivars

perennial

Tree Dahlia

Q: What zones can Tree Dahlia grow in?

Tree Dahlia is hardy in USDA Zones 6–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Q: Is Tree Dahlia deer resistant?

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

Q: When does Tree Dahlia bloom?

Tree Dahlia 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.

Q: Does Tree Dahlia need full sun?

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

Dahlia imperialis

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Same species

5 named cultivars

Essentials

At a Glance

Plant Type

Perennial

Height

72 inches

Width

36 inches

Light

Full Sun, Partial Sun

Zones

6, 7, 8, 9

Water

Moderate

Humidity

Moderate to high

Lifespan

Perennial (zone-dependent)

Native To

Mexico

Toxicity

Non-toxic

The Story

Plant Bio

Dahlia imperialis is a tall, perennial plant known for its striking pink flowers and lush foliage. It is notable for its height, reaching up to 6 feet, and is often used for screening or as a backdrop in gardens.

Uses & Benefits:

Dahlias provide vibrant, eye-catching flowers that enhance garden borders and containers, attracting pollinators like bees and butterflies.

Their tubers can be harvested and stored for propagation or culinary uses in some varieties.

Supports pollinator populations and adds biodiversity to garden ecosystems.

Marketplace

Where to Buy

Dancing Oaks

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Planting

How to Grow

Select a sunny location with well-draining soil to plant dahlias.
Tuck tubers 4-6 inches deep in spring after the last frost.
Water thoroughly after planting to settle the soil.
Mist cuttings with water and keep in warm, bright area for rooting.
Apply a balanced fertilizer monthly during the growing season.
Stake tall varieties early to support growth and prevent damage.

Pro Tip

Use organic compost to enrich soil and promote vibrant blooms.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist but not waterlogged 🌱
Pinch back early growth to encourage bushier plants
Apply mulch to retain moisture and suppress weeds

Don't

Avoid overwatering to prevent tuber rot ❌
Don’t forget to deadhead spent flowers for continuous blooming
Refrain from fertilizing late in the season to prevent weak growth

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vivid border with striking bloomsTall accent in flower bedsColorful container display

Companion Plants

Marigolds Zinnias Salvia Cosmos Lantana

Multiply

Propagation Methods

Good to Know

Common Questions

Tree Dahlia questions

What zones can Tree Dahlia grow in?

Tree Dahlia is hardy in USDA Zones 6–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Tree Dahlia deer resistant?

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

When does Tree Dahlia bloom?

Tree Dahlia 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 Tree Dahlia need full sun?

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