North America Native Plant

Tuberous Stoneseed

Botanical name: Lithospermum tuberosum

USDA symbol: LITU2

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Tuberous Stoneseed: A Hidden Gem for Native Plant Enthusiasts If you’re looking to add a touch of understated elegance to your native plant garden, tuberous stoneseed (Lithospermum tuberosum) might just be the perfect addition. This charming little perennial has been quietly beautifying the southeastern United States for centuries, and it’s ...

Rare plant alert!

Region: Arkansas

Status: S2: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Tuberous Stoneseed: A Hidden Gem for Native Plant Enthusiasts

If you’re looking to add a touch of understated elegance to your native plant garden, tuberous stoneseed (Lithospermum tuberosum) might just be the perfect addition. This charming little perennial has been quietly beautifying the southeastern United States for centuries, and it’s time more gardeners discovered its unique appeal.

What Makes Tuberous Stoneseed Special?

Tuberous stoneseed is a native herbaceous perennial that belongs to the borage family. As a forb, it’s a non-woody plant that comes back year after year, making it a reliable addition to any native garden. Don’t let its humble appearance fool you – this little plant packs a lot of character into its compact form.

The plant produces delicate white to pale yellow tubular flowers in spring that create a subtle but lovely display. While it may not be the showiest plant in your garden, its quiet beauty and ecological value make it a worthwhile choice for native plant enthusiasts.

Where Does Tuberous Stoneseed Call Home?

This southeastern native has quite an impressive range, naturally occurring across thirteen states: Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Texas, Virginia, and West Virginia. You’ll typically find it growing in open woodlands and along prairie edges in the wild.

Important Considerations Before Planting

Rarity Alert: Before you rush to add tuberous stoneseed to your shopping list, there’s something important to know. This species has a rarity status of S2 in Arkansas, meaning it’s considered rare in that state. While this makes it all the more special to grow, it also means you should only source plants or seeds from reputable native plant nurseries that practice responsible propagation methods. Never collect from wild populations!

Growing Conditions and Care

The good news is that tuberous stoneseed is relatively easy to grow once you understand its needs:

  • USDA Hardiness Zones: 6-9
  • Sun Requirements: Partial shade to full sun
  • Soil: Well-drained soils (avoid soggy conditions)
  • Water: Drought tolerant once established
  • Maintenance: Low maintenance – perfect for busy gardeners!

Perfect Garden Roles

Tuberous stoneseed shines in several garden situations:

  • Native plant gardens and naturalized landscapes
  • Woodland edge plantings
  • Wildflower meadows
  • Low-maintenance groundcover areas
  • Specialized native plant collections

Pollinator and Wildlife Benefits

While tuberous stoneseed may be small, it pulls its weight when it comes to supporting local wildlife. The spring flowers attract small native bees and other pollinators, making it a valuable addition to any pollinator-friendly garden. Every native plant counts when it comes to supporting our local ecosystems!

Planting and Care Tips

Here are some tried-and-true tips for success with tuberous stoneseed:

  • Fall planting often works best, giving the plant time to establish before spring growth
  • Once established, it requires minimal watering – perfect for water-wise gardening
  • Avoid overwatering, as good drainage is crucial
  • Give it space to spread naturally as groundcover
  • Minimal fertilization needed – native soils are usually sufficient

The Bottom Line

Tuberous stoneseed may not win any flashy flower contests, but it’s exactly the kind of plant that makes native gardening so rewarding. It’s low-maintenance, supports local wildlife, and connects your garden to the natural heritage of the Southeast. Just remember to source your plants responsibly – this little beauty deserves our protection and respect.

If you’re building a native plant garden or looking to add authentic regional character to your landscape, tuberous stoneseed is definitely worth considering. Your local pollinators will thank you, and you’ll have the satisfaction of growing a true native gem that’s perfectly adapted to your region’s climate and conditions.

Tuberous Stoneseed

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

Boraginaceae Juss. - Borage family

Genus

Lithospermum L. - stoneseed

Species

Lithospermum tuberosum Rugel ex DC. - tuberous stoneseed

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