Native Plants

Elongated Bluehearts

Buchnera longifolia

USDA symbol: BULO

biennial forb

Lower 48 states: native
Puerto Rico: native

If you’re looking to add a touch of wild beauty to your wetland garden or bog area, elongated bluehearts (Buchnera longifolia) might just be the perfect native plant for you. This charming biennial brings delicate purple-blue blooms to some of the Southeast’s most challenging growing conditions – and it does ...

Elongated Bluehearts: A Native Wetland Gem for Specialized Gardens

If you’re looking to add a touch of wild beauty to your wetland garden or bog area, elongated bluehearts (Buchnera longifolia) might just be the perfect native plant for you. This charming biennial brings delicate purple-blue blooms to some of the Southeast’s most challenging growing conditions – and it does so with remarkable grace.

What Makes Elongated Bluehearts Special

Elongated bluehearts is a native plant species found naturally in Alabama, Georgia, Mississippi, and Puerto Rico. As a biennial, this plant follows a two-year life cycle – spending its first year establishing roots and foliage, then blooming in its second year before setting seed. The plant gets its common name from its distinctively shaped flowers and elongated leaves that set it apart from other members of its family.

You might also encounter this plant listed under its botanical synonym, Buchnera elongata, in older gardening references or plant databases.

  • Species observed
  • No observations

A True Water Lover

Here’s where things get interesting – elongated bluehearts is classified as an obligate wetland plant in the Caribbean region, meaning it almost always occurs in wetlands. This isn’t a plant that tolerates occasional dry spells or moist but well-draining soil. It genuinely thrives in consistently wet conditions that would spell doom for many other garden plants.

Garden Appeal and Design Role

While elongated bluehearts may not be the showiest plant in your garden, it offers subtle charm with its small, tubular blue to purple flowers arranged in delicate spikes. The narrow, elongated leaves create an interesting texture contrast when paired with broader-leafed wetland plants.

This plant shines in:

  • Bog gardens and natural wetland areas
  • Native plant restoration projects
  • Rain gardens in appropriate climates
  • Naturalized areas near ponds or streams

Supporting Local Wildlife

The tubular flowers of elongated bluehearts are perfectly sized for small native bees and butterflies, making this plant a valuable addition to pollinator-friendly landscapes. As a native species, it has co-evolved with local wildlife and provides resources that non-native plants simply can’t match.

Growing Conditions and Care

Successfully growing elongated bluehearts requires embracing its wetland nature. This plant is suited for USDA hardiness zones 8-11, reflecting its natural range across the warmer regions of the Southeast and Caribbean.

Essential growing requirements:

  • Moisture: Consistently wet to saturated soil – think bog conditions
  • Light: Full sun to partial shade
  • Soil: Tolerates various soil types as long as they remain wet
  • Climate: Warm, humid conditions preferred

Planting and Care Tips

Growing elongated bluehearts can be challenging outside of its natural habitat, but it’s definitely possible with the right setup:

  • Start with seeds or seedlings from reputable native plant sources
  • Create bog-like conditions using a lined depression or container garden
  • Maintain consistent moisture – the soil should never dry out
  • Allow the plant to complete its biennial cycle naturally
  • Collect seeds after the second year’s bloom for future plantings

Is Elongated Bluehearts Right for Your Garden?

This plant is perfect for gardeners who want to create authentic wetland habitats or restore natural areas. However, it’s definitely not for everyone. If you don’t have naturally wet conditions or aren’t prepared to maintain consistently saturated soil, elongated bluehearts will likely struggle in your garden.

Consider this native beauty if you have:

  • A bog garden or wetland restoration project
  • Consistently wet areas in your landscape
  • A passion for native plants and wildlife habitat
  • The patience for biennial plants that take two years to flower

While elongated bluehearts may not be the easiest native plant to grow, it offers something truly special for gardeners willing to work with its unique requirements. By providing the wet conditions it craves, you’ll be rewarded with delicate blooms and the satisfaction of supporting local ecosystems with an authentic native plant.

Buchnera longifolia is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Buchnera longifolia is also known as:

Buchnera elongata | USDA symbol: BUEL

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" — matching plants to their ideal growing conditions, so they'll thrive with less care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Caribbean (PR, VI)

Obligate Wetland
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Scrophulariales
Family: Scrophulariaceae Juss. - Figwort family
Genus: Buchnera L. - bluehearts

Species: Buchnera longifolia Kunth - elongated bluehearts

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