Species

Dahlia x hortensisGarden Dahlia

6 other cultivars

perennial

Kelvin Floodlight Dahlia

Dahlia x hortensis 'Kelvin Floodlight'

The Story

Plant Bio

Kelvin Floodlight is a tall, vigorous dahlia with large, bright yellow flowers that are ideal for cutting gardens.

This cultivar is known for its exceptional flower size and vibrant color, making it a standout in any garden or floral arrangement.

Uses & Benefits:

Kelvin Floodlight dahlias produce vibrant, large flowers perfect for adding dramatic color to gardens and floral arrangements.

They can be cut and used in bouquets, bringing garden beauty indoors.

Attract pollinators like bees and butterflies, supporting local ecosystems.

SpeciesDahlia x hortensisGarden Dahlia

Essentials

At a Glance

Plant Type

Perennial

Height

36 inches

Width

24 inches

Light

Full Sun

Zones

8, 9, 10

Water

Moderate

Humidity

Moderate

Lifespan

Perennial in USDA zones 8-11

Native To

Mexico

Toxicity

Mildly toxic to pets if ingested

Bloom period

Mid-summer – Late summer

In flower about 2 months of the year

Planting

How to Grow

Tuck tubers into well-draining soil in early spring.
Water regularly to keep soil moist but not waterlogged.
Provide full sun for optimal flowering.
Pinch out the growing tips for bushier growth.
Fertilize every 4-6 weeks with a balanced fertilizer.
Lift and store tubers in fall after foliage dies back.

Pro Tip

Plant tubers 6 inches deep and space 18-24 inches apart for best results.

Keep It Thriving

Care Guide

Do

Water consistently during the growing season 💧
Pinch early to encourage bushier plants 🌱
Apply fertilizer monthly for vibrant blooms
Stake tall varieties to prevent flopping

Don't

Avoid overwatering to prevent rot ❌
Don’t plant in poorly drained soil
Refrain from fertilizing late in the season
Don’t forget to mulch to retain moisture

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

Brightly colored border plantsVivid summer flower bedsContainer displays for patios

Companion Plants

Marigolds SalviaZinnias CosmosPetunias

Multiply

Propagation Methods

Good to Know

Common Questions

Kelvin Floodlight Dahlia questions

What zones can Kelvin Floodlight Dahlia grow in?

Kelvin Floodlight 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 Kelvin Floodlight Dahlia deer resistant?

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

When does Kelvin Floodlight Dahlia bloom?

Kelvin Floodlight 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 Kelvin Floodlight Dahlia need full sun?

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