2 named cultivars

perennial

Dahlia

Dahlia hortensia

The Story

Plant Bio

Dahlia hortensia is known for its large, vibrant flowers and bushy growth habit. It prefers well-drained soil and plenty of sunlight.

This species is particularly noted for its stunning floral display, making it a popular choice for cut flower arrangements.

Uses & Benefits:

Dahlias bring vibrant color and texture to gardens, blooming from mid-summer to fall.

Ideal for cut flower arrangements with long-lasting blooms.

Provides nectar for pollinators like bees and butterflies.

Essentials

At a Glance

Plant Type

Perennial

Height

36 inches

Width

24 inches

Light

Full Sun, Partial Sun

Zones

8, 9, 10

Water

Moderate

Humidity

Moderate

Lifespan

Perennial in suitable zones

Native To

Central America

Toxicity

Mildly toxic to pets if ingested

Planting

How to Grow

Select a sunny location with well-draining soil.
Tuck seeds or tubers into soil 4-6 inches deep in early spring.
Water thoroughly after planting to settle the soil.
Mist cuttings regularly to maintain humidity and promote rooting.
Fertilize monthly with a balanced fertilizer during the growing season.
Pinch back the tips to encourage bushier growth in early summer.

Pro Tip

Use organic compost to enrich soil and ensure vibrant blooms.

Keep It Thriving

Care Guide

Do

Water deeply weekly during dry spells 🌱
Deadhead spent flowers to promote continuous blooming
Apply a balanced fertilizer monthly during active growth
Mulch around plants to retain moisture and suppress weeds
Support tall varieties with stakes to prevent damage

Don't

Overwater, leading to root rot ❌
Neglect to prune, which can reduce flowering
Use excessive fertilizer, causing lush foliage but fewer blooms
Plant in poorly drained soil, risking disease
Expose to frost before the danger passes ❌

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vibrant flower borderColorful perennial bedContainer centerpiece

Companion Plants

Marigolds Salvia Lobelia Zinnia Cosmos

Multiply

Propagation Methods

Good to Know

Common Questions

Dahlia questions

What zones can Dahlia grow in?

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 Dahlia deer resistant?

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

When does Dahlia bloom?

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 Dahlia need full sun?

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