North America Native Plant

Pacific Blazingstar

Botanical name: Mentzelia obscura

USDA symbol: MEOB3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Pacific Blazingstar: A Desert Gem for Water-Wise Gardens If you’re looking to add a touch of golden sunshine to your desert garden while supporting local wildlife, Pacific blazingstar might just be the perfect addition to your landscape. This charming native wildflower brings both beauty and ecological value to southwestern gardens, ...

Pacific Blazingstar: A Desert Gem for Water-Wise Gardens

If you’re looking to add a touch of golden sunshine to your desert garden while supporting local wildlife, Pacific blazingstar might just be the perfect addition to your landscape. This charming native wildflower brings both beauty and ecological value to southwestern gardens, all while requiring minimal care once established.

Meet the Pacific Blazingstar

Pacific blazingstar (Mentzelia obscura) is a delightful annual forb native to the southwestern United States. As a herbaceous plant without woody stems, it grows fresh each year from seed, creating seasonal displays of bright yellow, star-shaped flowers that seem to glow against the desert landscape.

This native beauty calls Arizona, California, Nevada, and Utah home, where it has evolved to thrive in the region’s challenging desert and semi-arid conditions. Being a true southwestern native means it’s perfectly adapted to local climate patterns and soil conditions.

Why Choose Pacific Blazingstar for Your Garden?

There are several compelling reasons to consider adding this native wildflower to your landscape:

  • Water-wise wonder: Once established, Pacific blazingstar requires minimal irrigation, making it perfect for drought-tolerant gardens
  • Pollinator magnet: The evening-opening flowers attract native bees, moths, and other desert pollinators
  • Low maintenance: As an annual that self-seeds, it requires little ongoing care
  • Native plant benefits: Supports local ecosystems and wildlife that co-evolved with this species
  • Unique blooming pattern: Flowers open in the evening, adding interest to twilight garden experiences

Perfect Garden Settings

Pacific blazingstar shines brightest in these garden types:

  • Desert and xeriscape gardens
  • Rock gardens and gravelly areas
  • Native plant landscapes
  • Naturalistic wildflower meadows
  • Low-water border plantings

The plant works beautifully as a seasonal ground cover or mixed into wildflower combinations with other native desert species.

Growing Conditions and Care

Pacific blazingstar is refreshingly easy to grow when you match its preferences:

Sunlight: Full sun is essential for best flowering and growth.

Soil: Well-draining sandy or rocky soils work best. The plant actually prefers poor, alkaline soils over rich garden soil.

Water: Minimal watering once established. Overwatering can actually harm this drought-adapted native.

Climate: Best suited for USDA hardiness zones 8-10, matching its native southwestern range.

Planting and Establishment Tips

Getting Pacific blazingstar established in your garden is straightforward:

  • Direct seed in fall or early spring for best germination
  • Scatter seeds on prepared soil surface and lightly rake in
  • Water gently until germination occurs, then reduce watering frequency
  • Allow plants to self-seed for natural annual cycles
  • Avoid fertilizing, as rich soils can reduce flowering

A Note on Evening Beauty

One of Pacific blazingstar’s most charming characteristics is its evening blooming habit. The yellow star-shaped flowers open as temperatures cool, creating a magical twilight display and providing nectar for night-active pollinators. This makes it a wonderful addition to evening gardens or areas where you like to relax after sunset.

The Bottom Line

Pacific blazingstar offers southwestern gardeners a perfect combination of native plant benefits, low maintenance requirements, and seasonal beauty. If you’re gardening in its native range and want to support local pollinators while creating a water-wise landscape, this little desert gem deserves serious consideration. Just remember to give it the well-draining, sunny conditions it craves, and then step back and let nature take its course.

Pacific Blazingstar

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Violales

Family

Loasaceae Juss. - Loasa family

Genus

Mentzelia L. - blazingstar

Species

Mentzelia obscura H.J. Thomp. & Roberts - Pacific blazingstar

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