9 named cultivars

perennial

Cactus Dahlia

Dahlia cactus

The Story

Plant Bio

Dahlias are known for their stunning flowers and variety in color and shape.

Cactus dahlias have unique, spiky petal forms that distinguish them from other dahlia types.

Uses & Benefits:

Dahlias provide vibrant, long-lasting blooms that brighten garden beds and containers, attracting pollinators and creating visual interest.

They can be cut for floral arrangements, extending their beauty indoors.

Attract hummingbirds and bees, supporting local pollinator populations.

Essentials

At a Glance

Plant Type

Perennial

Height

36 inches

Width

24 inches

Light

Full Sun

Zones

6, 7, 8

Water

Moderate

Humidity

Moderate

Lifespan

Perennial in zones 8-9, annual elsewhere

Native To

Central America

Toxicity

Non-toxic

Planting

How to Grow

Tuck tubers into well-draining soil in early spring after the last frost.
Water thoroughly after planting to settle the soil around the tubers.
Mist cuttings or divide tubers in late winter for propagation.
Provide full sun for at least 6 hours daily to encourage blooming.
Fertilize every 4-6 weeks with a balanced fertilizer during the growing season.
Pinch back early growth to promote bushier plants and more flowers.

Pro Tip

Use a stakes or cage to support tall or heavy-flowered varieties for best display.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist but not soggy 🌱
Deadhead spent blooms to encourage new flowers
Apply a balanced fertilizer monthly during active growth

Don't

Avoid overwatering to prevent tuber rot ❌
Don’t expose to frost; plant after danger of frost has passed
Avoid disturbing the tubers during the growing season

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

Colorful border plant with vibrant, cactus-like bloomsContainer accent for patios and decksBright focal point in mixed perennial beds

Companion Plants

Marigolds Zinnias Salvia CosmosPetunias

Multiply

Propagation Methods

Good to Know

Common Questions

Cactus Dahlia questions

What zones can Cactus Dahlia grow in?

Cactus Dahlia is hardy in USDA Zones 6–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Cactus Dahlia deer resistant?

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

When does Cactus Dahlia bloom?

Cactus 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 Cactus Dahlia need full sun?

Cactus Dahlia does best in full sun (6+ hours).