Species

Dahlia x hortensisGarden Dahlia

6 other cultivars

perennial

Martina Dahlia

Dahlia x hortensis 'Martina'

The Story

Plant Bio

Dahlia hortensis 'Martina' produces striking purple flowers with a bushy growth habit.

This cultivar is unique for its vibrant flower color and long blooming period.

Uses & Benefits:

Dahlias provide vibrant, showy flowers that brighten garden beds and containers, attracting pollinators like bees and butterflies.

Their tubers can be stored and replanted annually, offering a cost-effective way to enjoy continuous blooms.

Dahlias support local ecosystems by attracting beneficial insects and pollinators.

SpeciesDahlia x hortensisGarden Dahlia

Essentials

At a Glance

Plant Type

Perennial

Height

42 inches

Width

18 inches

Light

Full Sun

Zones

8, 9, 10

Water

Moderate

Humidity

Average

Lifespan

Tender perennial

Native To

Mexico

Toxicity

Mildly toxic to dogs and cats

Planting

How to Grow

Tuck seeds or tubers into well-draining soil in early spring.
Water consistently to keep soil moist but not waterlogged.
Provide full sun for optimal flowering and growth.
Stake tall varieties to support stems and prevent breakage.
Fertilize monthly with a balanced fertilizer during the growing season.
Deadhead spent flowers to encourage more blooms.

Pro Tip

Plant dahlias after the last frost for best results and to prevent rot.

Keep It Thriving

Care Guide

Do

Provide full sun for at least 6 hours daily 🌞
Water regularly to keep soil evenly moist 💧
Deadhead flowers to promote continuous blooming
Stake tall varieties to support stems
Apply balanced fertilizer monthly

Don't

Avoid overwatering to prevent tuber rot ❌
Don’t plant in poorly drained soil
Refrain from cutting back stems in late fall—wait until spring
Avoid fertilizing with high nitrogen to prevent legginess

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vibrant flower bordersColorful containersBright garden beds

Companion Plants

Marigolds Salvia Zinnia CosmosPetunias

Multiply

Propagation Methods

Good to Know

Common Questions

Martina Dahlia questions

What zones can Martina Dahlia grow in?

Martina 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 Martina Dahlia deer resistant?

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

When does Martina Dahlia bloom?

Martina Dahlia typically blooms in mid-summer to first frost through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Martina Dahlia need full sun?

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