High Country Gardens
Kelvin Floodlight Dinnerplate Dahlia
Best choice for gardeners wanting dramatic, long-lasting yellow cut flowers.
The Kelvin Floodlight Dinnerplate Dahlia boasts enormous, bright yellow flowers, reaching an impressive 7 to 8 inches in diameter. These stunning blooms provide a long-lasting display, making them ideal for cutting and bringing indoors. This perennial thrives in full sun and good garden soil, reaching heights of 36 to 48 inches. Hardy in zones 8-10, it offers a beautiful late summer bloom. For colder climates, treat it as an annual or store the tubers over winter.
$21.99
Owner Satisfaction
4.6
/ 5
Category Rank
864
/ 3268
#864 in Landscaping & Garden Plants
Price vs Category Average
-20%
Below average
Flower Size
8
/ Up to inches in diameter
Who it's for
- Gardeners seeking a bold, high-impact visual centerpiece
- Homeowners wanting long-lasting, vibrant seasonal color
- Floral designers creating dramatic, professional-grade indoor arrangements
Who should skip it
- Low-maintenance gardeners avoiding extra structural support tasks
- Busy growers wanting plants resistant to common garden pests
- Cold-climate gardeners preferring low-effort, year-round outdoor planting
Performance breakdown
Visual Impact
Massive eight-inch blooms create an undeniable focal point in any garden.
Pollinator Appeal
Bright yellow petals act as a natural beacon for local pollinators.
Floral Utility
Sturdy stems and long-lasting blooms make these perfect for indoor arrangements.
Climate Versatility
Requires tuber storage in colder regions to ensure year-over-year survival.
Growth Ease
Straightforward planting requirements make this accessible for most home gardeners.
Container Adaptability
Compact enough for large pots while maintaining impressive mature height.
Key Specs
Flower Size
Up to 8 inches in diameter
Mature Height
36-48 inches tall
Hardiness Zones
3-11 (Perennial in 9-10)
USDA Hardiness Zones
Zone 8, Zone 9, Zone 10
Planting Depth
1 to 2 inches
Spacing
1 bulb/tuber per square foot
Ships As
Bulb, Rhizome, Tuber
Plant Life Cycle
Perennial
Features
- Giant 7-8 inch bright yellow flowers
- Excellent for cut flower arrangements
- Attracts butterflies and hummingbirds
- Blooms from mid-summer until frost
- Perennial in warmer zones
- Suitable for container planting
- Easy to grow in full sun
What customers say
The Kelvin Floodlight Dahlia consistently earns high marks for its spectacular performance and reliable quality. Customers frequently highlight the impressive dinnerplate size and the brilliant, true to type yellow orange coloring, confirming its status as a garden showstopper. Reviewers appreciate the robust tubers received, which translate into vigorous plants and abundant, reliable blooms season after season. This exceptional visual impact solidifies its strong value proposition.
Know before you buy
These dinnerplate dahlias produce massive, vibrant yellow blooms that typically measure between 7 and 8 inches in diameter.
Yes, they are well-suited for container gardening. Ensure your pot is large enough to accommodate the 36 to 48-inch mature height and provides excellent drainage.
While they are perennial in zones 8-10, gardeners in colder regions should treat them as annuals or dig up and store the tubers in a cool, dry place over the winter to replant in the spring.
They thrive in full sun and prefer well-draining garden soil. Regular deadheading of spent blooms will encourage the plant to continue producing flowers from mid-summer until the first frost.
Absolutely. Their long, sturdy stems and impressive bloom size make them an excellent choice for cut flower arrangements.
Yes, the bright, nectar-rich flowers are known to attract both butterflies and hummingbirds to the garden throughout the late summer bloom season.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$22