North America Native Plant

Granite Hedgehyssop

Botanical name: Gratiola graniticola

USDA symbol: GRGR7

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Granite Hedgehyssop: A Rare Native Gem Worth Protecting Meet granite hedgehyssop (Gratiola graniticola), a charming little native wildflower that’s as rare as it is special. This delicate annual herb might not be the showiest plant in your garden, but it carries an important story about conservation and the beauty of ...

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 ⚘

Granite Hedgehyssop: A Rare Native Gem Worth Protecting

Meet granite hedgehyssop (Gratiola graniticola), a charming little native wildflower that’s as rare as it is special. This delicate annual herb might not be the showiest plant in your garden, but it carries an important story about conservation and the beauty of our native flora.

What Makes Granite Hedgehyssop Special?

Granite hedgehyssop is a true American native, naturally occurring only in Georgia and South Carolina. As its name suggests, this petite forb has adapted to some pretty specific conditions, making it a fascinating example of nature’s ability to thrive in unique environments.

This annual plant belongs to the forb family – essentially a fancy way of saying it’s a non-woody flowering plant that completes its entire life cycle in one growing season. Unlike perennials that return year after year, granite hedgehyssop puts all its energy into producing flowers and seeds before winter arrives.

A Plant That Needs Our Help

Here’s where things get serious: granite hedgehyssop is considered vulnerable, with a Global Conservation Status of S3. This means it’s either very rare throughout its range or found only in restricted areas. With typically just 21 to 100 known occurrences and between 3,000 to 10,000 individual plants in the wild, this little beauty is definitely on the rare side.

If you’re thinking about adding granite hedgehyssop to your garden, that’s wonderful – but please make sure you’re getting your plants or seeds from responsible, ethical sources. Never collect from wild populations, as this could harm the species’ already precarious status.

Is Granite Hedgehyssop Right for Your Garden?

Granite hedgehyssop could be a perfect addition to your native plant collection if you:

  • Live in Georgia or South Carolina where it naturally occurs
  • Want to support native plant conservation
  • Enjoy growing rare and unusual species
  • Are interested in annual wildflowers
  • Want to contribute to local ecosystem restoration

As a forb, this plant will fit nicely into wildflower meadows, native plant gardens, or naturalized areas. Since it’s an annual, it’s perfect for gardeners who enjoy the excitement of replanting and watching the full growth cycle each year.

Growing Granite Hedgehyssop Successfully

Unfortunately, detailed growing information for granite hedgehyssop is limited due to its rarity and specialized nature. However, as a native plant of Georgia and South Carolina, it’s adapted to the growing conditions of the southeastern United States.

Since specific care requirements aren’t well-documented, your best bet is to:

  • Contact local native plant societies in Georgia or South Carolina for growing advice
  • Reach out to botanical gardens or universities in the region
  • Connect with conservation organizations working with rare native plants
  • Observe the natural conditions where the plant is found if you’re lucky enough to see it in the wild

The Conservation Connection

By choosing to grow granite hedgehyssop responsibly, you’re not just adding an interesting plant to your garden – you’re participating in conservation. Home gardens can serve as genetic reservoirs for rare plants, helping ensure their survival for future generations.

Remember, the key word here is responsibly. Always purchase from reputable native plant nurseries or seed companies that can verify their sources. Some botanical gardens and conservation organizations may occasionally have seed available through their conservation programs.

Final Thoughts

Granite hedgehyssop may be small and somewhat mysterious, but it represents something much larger: our responsibility to protect and celebrate native biodiversity. While we may not know all the details about its care requirements or ecological relationships yet, we do know it’s worth preserving.

If you decide to grow this rare beauty, you’ll be joining a small but dedicated group of gardeners who are helping keep our native plant heritage alive, one seed at a time.

Granite Hedgehyssop

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

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Gratiola L. - hedgehyssop

Species

Gratiola graniticola D. Estes - granite hedgehyssop

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