19 named cultivars

perennial

Dahlia

Dahlia variabilis

The Story

Plant Bio

Dahlia variabilis is known for its vibrant flowers and diverse color range, making it a popular choice for gardens and floral arrangements.

This species is an excellent cut flower and can produce blooms throughout the summer until the first frost.

Uses & Benefits:

Dahlias provide vibrant, long-lasting blooms that enhance garden aesthetics and cut flower arrangements.

They can be grown in containers for patios and small spaces, adding versatile color.

Attract pollinators like bees and butterflies, supporting local ecosystems.

Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

18 inches

Light

Full Sun

Zones

5, 6, 7, 8, 9, 10

Water

Moderate

Humidity

Moderate to high

Lifespan

Perennial in zones 8-10, annual elsewhere

Native To

Mexico and Central America

Toxicity

Toxic to pets

Planting

How to Grow

Choose a sunny spot with well-draining soil for planting.
Tuck tubers 4-6 inches deep in early spring after the last frost.
Water regularly to keep soil moist but not waterlogged.
Fertilize monthly with a balanced fertilizer during the growing season.
Stake tall varieties to support growth and prevent breakage.
Deadhead spent flowers to promote continuous blooming.

Pro Tip

Mulch around the plants to retain moisture and suppress weeds, especially in hot climates.

Keep It Thriving

Care Guide

Do

Water deeply once a week during dry spells 🌱
Provide support for tall varieties
Remove dead or faded flowers regularly
Apply a balanced fertilizer monthly
Plant in full sun for best blooms

Don't

Avoid overwatering to prevent tuber rot ❌
Don’t forget to mulch to conserve moisture
Refrain from disturbing tubers during the growing season
Avoid planting in shady areas
Don’t neglect staking tall varieties

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Colorful garden bordersVivid container displaysBright accents in flower beds

Companion Plants

Marigolds Salvia CosmosZinnias Sweet potato vine

Multiply

Propagation Methods

Good to Know

Common Questions

Dahlia questions

What zones can Dahlia grow in?

Dahlia is hardy in USDA Zones 5–10. 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 (6+ hours).