North America Native Plant

Largeflower False Rosemary

Botanical name: Conradina grandiflora

USDA symbol: COGR8

Life cycle: perennial

Habit: shrub

Native status: Native to the lower 48 states  

Largeflower False Rosemary: A Rare Florida Native Worth Protecting in Your Garden Meet largeflower false rosemary (Conradina grandiflora), a charming little shrub that’s as rare as it is beautiful. This Florida native might just be the perfect addition to your drought-tolerant garden – if you can find it responsibly sourced, ...

Rare plant alert!

Region: Conservation status by state

Status: S3: Status is uncertain but is somewhere between the following rankings: Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Largeflower False Rosemary: A Rare Florida Native Worth Protecting in Your Garden

Meet largeflower false rosemary (Conradina grandiflora), a charming little shrub that’s as rare as it is beautiful. This Florida native might just be the perfect addition to your drought-tolerant garden – if you can find it responsibly sourced, that is. Let’s dive into why this special plant deserves a spot in your landscape and how to keep it happy once it’s there.

What Makes Largeflower False Rosemary Special?

Don’t let the name fool you – this isn’t actually rosemary, though it does share that lovely aromatic quality. Largeflower false rosemary is a compact, multi-stemmed perennial shrub that typically stays under 13-16 feet tall (though most garden specimens remain much smaller and more manageable). Its needle-like leaves release a pleasant fragrance when brushed against, and from spring through fall, it produces delicate tubular flowers in shades of lavender to purple that pollinators absolutely adore.

A True Florida Native with a Story

This plant is as Florida as it gets – it’s found nowhere else in the world except the Sunshine State. Largeflower false rosemary calls Florida’s unique scrub habitats home, particularly those ancient sand dune ecosystems that have been around for thousands of years.

Important Conservation Note

Here’s where things get serious: largeflower false rosemary has a conservation status of S3, meaning it’s considered vulnerable. With only an estimated 21-100 populations and between 3,000-10,000 individuals remaining in the wild, this plant is genuinely rare. If you’re interested in growing it, please only purchase from reputable native plant nurseries that propagate their own stock rather than collecting from wild populations.

Why Grow Largeflower False Rosemary?

Beyond helping conserve a rare species, there are plenty of practical reasons to love this plant:

  • Extremely drought tolerant once established
  • Attracts bees, butterflies, and other native pollinators
  • Requires minimal maintenance
  • Perfect for small spaces and container gardens
  • Blooms for an extended season
  • Aromatic foliage adds sensory interest

Perfect Garden Roles

Largeflower false rosemary shines in several landscape situations:

  • Xeriscaping: Its drought tolerance makes it ideal for water-wise gardens
  • Rock gardens: Thrives in well-drained, sandy conditions
  • Native plant gardens: A must-have for Florida native enthusiasts
  • Pollinator gardens: A reliable nectar source for local wildlife
  • Border plantings: Creates neat, compact edges

Growing Conditions and Care

The good news is that once you understand its needs, largeflower false rosemary is surprisingly easy to grow. Think Florida scrub and you’ll get the idea:

Climate: Hardy in USDA zones 8b-10a, making it perfect for most of Florida and similar climates.

Soil: Well-drained, sandy soil is essential. This plant absolutely cannot tolerate wet feet or heavy clay soils. Poor to moderately fertile soils are actually preferred – don’t pamper it with rich compost.

Sun: Full sun is best, though it can tolerate some light shade.

Water: Drought tolerant once established, but provide regular water during the first growing season. After that, natural rainfall should be sufficient in most areas.

Planting and Care Tips

Getting started with largeflower false rosemary is straightforward:

  • When to plant: Spring or fall are ideal planting times in Florida
  • Spacing: Allow 2-3 feet between plants for proper air circulation
  • Watering: Water regularly the first year, then taper off – overwatering is more dangerous than underwatering
  • Fertilizing: Generally unnecessary; too much fertilizer can actually harm the plant
  • Pruning: Light pruning after flowering helps maintain shape, but isn’t required
  • Mulching: A light layer of sand or gravel works better than organic mulch

Pollinator and Wildlife Benefits

While we don’t have extensive data on all wildlife interactions, we do know that the tubular flowers are perfectly designed for attracting bees and butterflies. The extended blooming period means it provides a reliable nectar source when many other plants have finished flowering for the season.

The Bottom Line

Largeflower false rosemary represents everything wonderful about native plant gardening – it’s beautiful, low-maintenance, supports local wildlife, and connects your garden to Florida’s unique natural heritage. Just remember to source it responsibly from nurseries that propagate rather than collect wild plants. By growing this rare beauty in your garden, you’re not just creating a lovely landscape feature – you’re participating in conservation efforts that help ensure future generations can enjoy this special Florida native.

Ready to add some authentic Florida charm to your garden? Seek out largeflower false rosemary from a reputable native plant nursery and give this rare gem the garden home it deserves.

Largeflower False Rosemary

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

Lamiales

Family

Lamiaceae Martinov - Mint family

Genus

Conradina A. Gray - false rosemary

Species

Conradina grandiflora Small - largeflower false rosemary

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