perennial RHS Award

Chat Noir Dahlia

Dahlia cactus 'Chat Noir'

The Story

Plant Bio

Chat Noir is known for its striking dark, almost black flowers with a spiky appearance typical of cactus dahlias.

This cultivar is unique for its dark coloring which is rare among dahlias, making it a dramatic focal point in gardens.

Uses & Benefits:

Ornamental UsesDahlias with cactus petals add striking color and texture to gardens, attracting pollinators and providing visual drama.
Practical UsesTheir long-lasting blooms can be harvested for cut flower arrangements, enhancing indoor decor.
Ecological BenefitsAttract hummingbirds and bees, supporting local pollinator populations.
SpeciesDahlia cactusCactus Dahlia

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

Tender perennial

Native To

Mexico

Toxicity

Toxic to dogs, cats, and horses

Bloom period

Late summer – Early fall

J
F
M
A
M
J
J
A
S
O
N
D

In flower about 2 months of the year

Planting

How to Grow

  1. Plant tubers in well-draining soil in spring after the last frost.
  2. Tuck tubers 4-6 inches deep, with the eyes facing upward.
  3. Water thoroughly after planting to settle the soil.
  4. Mist cuttings or start from tubers in early spring indoors for earlier blooms.
  5. Ensure bright, direct sunlight for at least 6 hours daily.
  6. Fertilize monthly with a balanced, water-soluble fertilizer during the growing season.

Pro Tip

Use a cactus-style pot with excellent drainage for container cultivation.

Keep It Thriving

Care Guide

Do

  • Water deeply but infrequently to prevent rot 🌱
  • Provide full sun for optimal flowering
  • Apply balanced fertilizer monthly during growth
  • Stake tall varieties to support stems

Don't

  • Avoid overwatering, which can cause tuber rot ❌
  • Do not expose to frost; bring indoors or mulch heavily in cold climates
  • Refrain from disturbing tubers during the growing season
  • Don't plant in heavy clay soil without amendments

Seasonal Care Calendar

TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deadhead
Lift Store
Pinch
Plant
Stake

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Brightly colored border plantDramatic focal point in flower bedsContainer centerpiece with exotic appeal

Companion Plants

Marigolds Zinnias SalviaCosmosNicotiana

Multiply

Propagation Methods

Good to Know

Common Questions

Chat Noir Dahlia questions

What zones can Chat Noir Dahlia grow in?

Chat Noir 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 Chat Noir Dahlia deer resistant?

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

When does Chat Noir Dahlia bloom?

Chat Noir 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 Chat Noir Dahlia need full sun?

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

Keep exploring

Grow Chat Noir Dahlia with confidence

See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.