Dahlia - Kelvin Floodlight
Best choice for gardeners wanting massive, heat-tolerant yellow blooms all season.
Brighten your garden with the Dahlia 'Kelvin Floodlight,' a perennial favorite known for its giant, fully double blooms. These spectacular flowers, measuring 8 to 10 inches wide, radiate a hot, sunny yellow color, illuminating spaces with a floodlight-like glow. Ideal for creating stunning centerpieces or for use as cut flowers, these tubers thrive in full sun and are reported by customers to have excellent heat tolerance. They bloom consistently from summer into fall, adding vibrant color to your landscape.
$23.96
Owner Satisfaction
4.6
/ 5
Category Rank
717
/ 3088
#717 in Plant & Flower Bulbs
Price vs Category Average
+2%
Above average
Includes
3
/ Clumps of Tubers
Who it's for
- Gardeners seeking high-impact, dramatic focal points
- Pollinator enthusiasts wanting vibrant, eye-catching color
- Floral designers needing sturdy, long-lasting cut flowers
Who should skip it
- Low-maintenance gardeners avoiding extra structural support
- Busy homeowners wanting low-effort, year-round garden plants
- Beginners discouraged by frequent pest and disease management
Performance breakdown
Bloom Impact
Massive ten-inch flowers provide an unmatched visual statement in any garden.
Heat Resilience
Thrives in sweltering summer conditions where other varieties often wilt.
Floral Utility
Sturdy stems and vibrant color make these perfect for indoor arrangements.
Pollinator Appeal
Bright yellow petals act as a natural beacon for local bees.
Growth Consistency
Reliable upright habit ensures a tidy look throughout the growing season.
Planting Ease
Standard tuber depth requirements make setup straightforward for most home gardeners.
Key Specs
Includes
3 Clumps of Tubers
Planting Depth
Tubers 3-4"; Crown at soil line
Proximity
18-24"
Planting Season
Spring
Bloom Season
Summer to Fall
Water Quantity
Moderate
Sunlight Quantity
Full Sun
Hardiness Zones
8-11
Features
- Giant, radiant yellow blooms
- Flowers up to 10 inches wide
- Blooms summer through fall
- Excellent for cut flowers
- Heat tolerant
- Attracts bees and butterflies
- Perennial life cycle
- Upright growth habit
What customers say
The Dahlia Kelvin Floodlight earns high praise primarily for its spectacular bloom quality and reliable performance. Gardeners consistently celebrate the massive, true to description golden yellow flowers, often calling them impressive dinner plate varieties perfect for dramatic garden impact and stunning indoor arrangements. Customers report high sprouting rates and vigorous growth from the tubers, ensuring prolific flowering throughout the season. While a few minor issues like shipping damage or the need for substantial staking are noted, the overwhelming consensus is that the magnificent, high impact results delivered by this variety far exceed any minor maintenance or logistical concerns. This leads to strong customer satisfaction and high recommendations.
Know before you buy
The 'Kelvin Floodlight' is known for its impressive size, producing fully double blooms that typically measure between 8 and 10 inches in diameter.
Given their height of 36 to 48 inches and large, heavy blooms, it is highly recommended to provide support or staking to keep the upright stems from bending or breaking in the wind.
Yes, these dahlias can be grown in containers, provided the pot is large enough to accommodate their root system and offers excellent drainage. Ensure the container is at least 12 to 16 inches deep and wide to support their mature size.
Yes, this variety is noted for its excellent heat tolerance, making it a reliable choice for gardens in warmer climates within hardiness zones 8 through 11.
Dahlias prefer moderate watering. Keep the soil consistently moist but well-drained, ensuring the tubers do not sit in waterlogged soil, which can lead to rot.
Absolutely. The bright, sunny yellow blooms are highly attractive to bees and butterflies, making them a great addition to a pollinator-friendly landscape.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$24