North America Non-native Plant

Candle Larkspur

Botanical name: Delphinium elatum

USDA symbol: DEEL2

Life cycle: perennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in Alaska âš˜ Non-native, reproduces and persists in the wild in Canada âš˜ Non-native, reproduces and persists in the wild in the lower 48 states  

Candle Larkspur: A Towering Beauty for Your Garden If you’ve ever dreamed of adding some serious height and drama to your flower beds, candle larkspur (Delphinium elatum) might just be the showstopper you’re looking for. This perennial forb creates spectacular vertical displays that can transform any garden into something truly ...

Candle Larkspur: A Towering Beauty for Your Garden

If you’ve ever dreamed of adding some serious height and drama to your flower beds, candle larkspur (Delphinium elatum) might just be the showstopper you’re looking for. This perennial forb creates spectacular vertical displays that can transform any garden into something truly magical.

What is Candle Larkspur?

Candle larkspur is a perennial flowering plant that belongs to the buttercup family. As a forb, it’s an herbaceous plant without significant woody tissue, meaning it dies back to the ground each winter and emerges fresh each spring. Don’t let that fool you though – this plant means business when it comes to making a statement in your garden.

Native Status and Distribution

Here’s something important to know upfront: candle larkspur isn’t native to North America. It’s been introduced from its original range and now reproduces spontaneously in the wild across Alaska, Canada, and the lower 48 states. You’ll find established populations in British Columbia, Alaska, Manitoba, New Brunswick, Saskatchewan, Michigan, and Wisconsin.

Why Gardeners Love (and Sometimes Struggle With) Candle Larkspur

There’s no denying the appeal of candle larkspur’s towering flower spikes. These beauties can reach impressive heights and produce densely packed flowers in shades of blue, purple, pink, and white. They’re absolutely perfect for:

  • Creating dramatic backdrops in perennial borders
  • Adding vertical interest to cottage-style gardens
  • Providing excellent cut flowers for arrangements
  • Attracting pollinators like bees and hummingbirds

However, candle larkspur isn’t exactly what you’d call low-maintenance. These plants have some specific needs and can be a bit finicky about their growing conditions.

Growing Conditions and Care

Candle larkspur thrives in USDA hardiness zones 3-7, which tells you something important – it loves cool weather. Here’s what you need to know about keeping these plants happy:

Light and Soil: Provide full sun to partial shade and rich, well-draining soil. These plants are heavy feeders and appreciate soil that’s been amended with compost or well-aged manure.

Climate Preferences: Cool summers are key to success. If you live in an area with hot, humid summers, you might find candle larkspur challenging to grow long-term.

Support Systems: Those tall flower spikes are gorgeous, but they definitely need staking to prevent them from toppling over in wind or heavy rain.

Planting and Maintenance Tips

Here are some tried-and-true tips for growing healthy candle larkspur:

  • Plant in early spring or fall when temperatures are cool
  • Space plants adequately to ensure good air circulation
  • Install stakes early in the season before plants get too tall
  • Deadhead spent flowers to encourage additional blooms
  • Provide consistent moisture, but avoid waterlogged conditions
  • Apply mulch to keep roots cool and retain moisture

A Word About Alternatives

While candle larkspur can be a stunning addition to the right garden, it’s worth considering some native alternatives that might be easier to grow and better for local ecosystems. Native plants like wild bergamot, cardinal flower, or native asters can provide similar vertical interest and dramatic blooms while supporting local wildlife more effectively.

The Bottom Line

Candle larkspur is undeniably beautiful and can create breathtaking displays in the right conditions. If you have cool summers, rich soil, and don’t mind providing some extra care and attention, it might be worth trying. Just remember to give it the support it needs – both literally with stakes and figuratively with proper growing conditions. And if you find it challenging, don’t feel bad about exploring native alternatives that might be better suited to your local climate and ecosystem.

Candle Larkspur

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Magnoliidae

Order

Ranunculales

Family

Ranunculaceae Juss. - Buttercup family

Genus

Delphinium L. - larkspur

Species

Delphinium elatum L. - candle larkspur

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA