Coreopsis Big Bang 'Mercury Rising'
Best low-maintenance perennial for gardeners seeking vibrant, drought-tolerant summer color.
This perennial is the ultimate low-effort workhorse for sunny borders, delivering a relentless display of deep wine-red blooms all summer. While it demands a bit of deadheading to keep the color coming, its natural resistance to mildew and deer makes it an incredibly reliable choice for a fuss-free garden.
$18.00
at
White Flower Farm
Who it's for
- Gardeners seeking vibrant, long-lasting color that resists fading
- Landscapers wanting continuous, season-long floral interest
- Homeowners needing tidy, low-maintenance, and disease-resistant perennials
Who should skip it
- Gardeners preferring long-lived, permanent landscape fixtures
- Busy homeowners lacking time for regular maintenance tasks
- Gardeners with heavy, wet soil or high slug populations
Performance breakdown
Bloom consistency
Deep wine-red color remains vibrant and abundant throughout the entire summer.
Disease resistance
Narrow foliage structure effectively prevents common powdery mildew issues.
Maintenance ease
Simple deadheading is the only requirement for continuous, reliable repeat blooming.
Drought tolerance
Once established, this plant handles dry spells with impressive resilience.
Pollinator appeal
Reliably draws butterflies, though it lacks the broader range of other perennials.
Landscape versatility
Compact mounding habit fits perfectly into borders or cut flower arrangements.
Key Specs
Lifespan
Perennial
Bloom Time
Summer (June-September)
Mature Height
15-18 inches
Plant Spacing
24 inches
Sun Exposure Requirement
Full Sun
USDA Hardiness Zones
5 to 9
Water Needs
Medium
Fertilization Schedule
Light application once in early spring
Growth Habit
Mounding
Soil Type Preference
Well-Drained
Know before you buy
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