North America Native Plant

Lobelia

Botanical name: Lobelia ×speciosa

USDA symbol: LOSP2

Life cycle: perennial

Habit: forb

Native status: Native to Canada âš˜ Native to the lower 48 states  

Growing Lobelia: A Native Perennial for Your Garden If you’re looking to add a touch of native charm to your garden, Lobelia ×speciosa might just be the perfect candidate. This perennial lobelia represents a fascinating example of nature’s own plant breeding, offering gardeners a unique opportunity to grow something truly ...

Growing Lobelia: A Native Perennial for Your Garden

If you’re looking to add a touch of native charm to your garden, Lobelia ×speciosa might just be the perfect candidate. This perennial lobelia represents a fascinating example of nature’s own plant breeding, offering gardeners a unique opportunity to grow something truly special in their landscapes.

What Makes This Lobelia Special?

Lobelia ×speciosa is a hybrid species, as indicated by the × in its botanical name. This native North American perennial belongs to the forb family – essentially a fancy way of saying it’s a non-woody flowering plant that comes back year after year. Unlike shrubs or trees, this lobelia stays herbaceous, meaning it maintains soft, green stems without developing significant woody tissue.

Where Does It Call Home?

This lobelia is a true North American native, naturally occurring in both Canada and the lower 48 United States. You’ll find it growing wild across a diverse range of locations, from Ontario in the north down through the American Midwest and Plains states, including Colorado, Illinois, Indiana, Kansas, Missouri, and Oklahoma.

Is This Lobelia Right for Your Garden?

As a native species, Lobelia ×speciosa offers several advantages for the eco-conscious gardener:

  • It’s naturally adapted to North American growing conditions
  • As a perennial, it provides long-term garden value
  • Its native status means it supports local ecosystems
  • It requires no special permits or concerns about invasiveness

However, there’s an important caveat: being a hybrid species, specific growing information about Lobelia ×speciosa can be challenging to find. This means you might need to do some garden detective work to determine the best growing conditions for your particular location.

The Growing Challenge

Here’s where things get a bit tricky – and interesting! Because Lobelia ×speciosa is a hybrid, detailed cultivation information specific to this plant is quite limited. Most gardening resources focus on its parent species rather than this particular hybrid. This presents both a challenge and an opportunity for adventurous gardeners who enjoy experimenting with unique plants.

General Lobelia Growing Tips

While specific information about Lobelia ×speciosa may be scarce, we can draw from general lobelia growing wisdom:

  • Most lobelias prefer consistently moist soil
  • They typically thrive in partial shade to full sun conditions
  • Good drainage is usually important to prevent root problems
  • As perennials, they benefit from mulching in winter

Should You Grow It?

If you’re the type of gardener who loves a good botanical mystery and enjoys growing unusual native plants, Lobelia ×speciosa could be a rewarding addition to your garden. Its native status means you’re supporting local biodiversity, and its perennial nature provides lasting garden value.

However, if you prefer plants with well-documented growing requirements and predictable garden performance, you might want to consider its better-known relatives like Cardinal Flower (Lobelia cardinalis) or Great Blue Lobelia (Lobelia siphilitica), which offer similar native benefits with more readily available growing information.

The Bottom Line

Lobelia ×speciosa represents an intriguing opportunity for gardeners interested in native plants and botanical rarities. While growing information may be limited, its native status across multiple states suggests it’s adaptable and worth trying in appropriate climates. Just be prepared for some trial and error as you learn what makes this unique hybrid happy in your garden!

Remember, successful gardening often involves experimentation, and growing a less common native hybrid like this one can be both educational and rewarding. Who knows? You might just become one of the few gardeners with firsthand experience growing this fascinating native lobelia.

Lobelia

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Campanulales

Family

Campanulaceae Juss. - Bellflower family

Genus

Lobelia L. - lobelia

Species

Lobelia ×speciosa Sweet (pro sp.) [cardinalis × siphilitica] - lobelia

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