North America Native Plant

Turpentine Weed

Botanical name: Trichostema laxum

USDA symbol: TRLA5

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Turpentine Weed: A Fragrant Native Annual for West Coast Gardens If you’re looking for an easy-to-grow native wildflower that brings a unique aromatic twist to your garden, turpentine weed (Trichostema laxum) might just be the perfect addition to your landscape. This charming little annual has been quietly thriving along the ...

Turpentine Weed: A Fragrant Native Annual for West Coast Gardens

If you’re looking for an easy-to-grow native wildflower that brings a unique aromatic twist to your garden, turpentine weed (Trichostema laxum) might just be the perfect addition to your landscape. This charming little annual has been quietly thriving along the West Coast for centuries, and it’s ready to bring its distinctive personality to your native plant garden.

What Makes Turpentine Weed Special?

Don’t let the name fool you – while turpentine weed does have a distinctive, somewhat resinous scent when you brush against its leaves, it’s far from being a garden nuisance. This native annual is actually a delightful forb that produces clusters of small purple-blue flowers that seem to dance in the breeze. As an herbaceous plant without woody stems, it maintains a soft, natural appearance that fits perfectly into wildflower gardens and naturalized landscapes.

Where Does Turpentine Weed Call Home?

Turpentine weed is a true West Coast native, naturally occurring in California and Oregon. This plant has adapted beautifully to the Mediterranean climate patterns of the Pacific Coast, making it an excellent choice for gardeners in these regions who want to support local ecosystems with authentic native species.

Why Gardeners Love (and Sometimes Overlook) This Native

Here’s why turpentine weed deserves a spot in your garden:

  • Effortless growing: As a drought-tolerant annual, it practically grows itself once established
  • Pollinator magnet: The small flowers attract bees and other beneficial pollinators
  • Self-sustaining: This annual readily self-seeds, creating natural drifts year after year
  • Authentic native choice: Perfect for gardeners committed to true regional natives

The main consideration is that turpentine weed works best in naturalized settings rather than formal garden beds, and some gardeners find the aromatic foliage either charming or overwhelming – it’s definitely a matter of personal preference!

Perfect Garden Situations

Turpentine weed thrives in:

  • Native plant gardens
  • Wildflower meadows
  • Naturalized landscape areas
  • Drought-tolerant garden sections
  • Pollinator gardens with a wild aesthetic

Growing Conditions and Care

One of turpentine weed’s best qualities is how undemanding it is. This plant thrives in USDA hardiness zones 8-10, making it perfect for the mild winter regions where it naturally occurs.

Ideal conditions include:

  • Full sun exposure
  • Well-drained, even somewhat poor soils
  • Minimal water once established
  • Good air circulation

Planting and Care Tips

Getting turpentine weed established in your garden is refreshingly simple. Since it’s an annual, starting from seed is the most practical approach. Scatter seeds in fall or early spring directly where you want the plants to grow – they don’t transplant well once established.

Once your turpentine weed is growing:

  • Water sparingly; this plant prefers drier conditions
  • Avoid fertilizing, which can make the plants leggy
  • Allow some plants to go to seed for next year’s display
  • Enjoy the aromatic foliage when you brush against it during garden walks

Supporting Pollinators and Wildlife

While turpentine weed might seem modest compared to showier native flowers, it plays an important role in supporting local pollinators. The small purple-blue flowers provide nectar for bees and other beneficial insects, making this plant a valuable contributor to pollinator-friendly gardens.

Is Turpentine Weed Right for Your Garden?

Consider adding turpentine weed to your landscape if you love low-maintenance natives, want to support local pollinators, and appreciate plants with unique aromatic qualities. It’s an excellent choice for gardeners in California and Oregon who are creating authentic native plant communities or naturalized areas.

However, if you prefer highly controlled garden spaces or are sensitive to strong plant scents, you might want to experience this plant in a natural setting first before committing to it in your own garden.

Either way, turpentine weed represents the understated beauty of West Coast native flora – sometimes the most rewarding garden plants are the ones that ask for very little while giving back to the local ecosystem in meaningful ways.

Turpentine Weed

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

Trichostema L. - bluecurls

Species

Trichostema laxum A. Gray - turpentine weed

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