North America Native Plant

Robbins’ Phacelia

Botanical name: Phacelia strictiflora var. robbinsii

USDA symbol: PHSTR

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Robbins’ Phacelia: A Rare Prairie Gem Worth Protecting Meet Robbins’ phacelia (Phacelia strictiflora var. robbinsii), a charming little wildflower that’s become something of a botanical treasure hunt prize. This delicate annual forb might not be the showiest plant in your garden, but what it lacks in size, it makes up ...

Rare plant alert!

Region: Arkansas

Status: S1: Status is uncertain but is somewhere between the following rankings: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ 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) ⚘

Region: Arkansas

Robbins’ Phacelia: A Rare Prairie Gem Worth Protecting

Meet Robbins’ phacelia (Phacelia strictiflora var. robbinsii), a charming little wildflower that’s become something of a botanical treasure hunt prize. This delicate annual forb might not be the showiest plant in your garden, but what it lacks in size, it makes up for in ecological importance and conservation value.

A Rare Native Beauty

Robbins’ phacelia is a true native son of the American South, naturally occurring across Alabama, Arkansas, Louisiana, Mississippi, Oklahoma, and Texas. However, here’s where things get serious – this little beauty is considered rare in much of its range. In Alabama, it holds an S1 rarity status, meaning it’s critically imperiled, while Arkansas lists it as S1S2, indicating it’s critically imperiled to imperiled.

What does this mean for gardeners? If you’re lucky enough to find responsibly sourced seeds or plants, you’re not just adding a wildflower to your garden – you’re participating in conservation efforts for a species that needs our help.

What Makes Robbins’ Phacelia Special

As an annual forb, Robbins’ phacelia completes its entire life cycle in one growing season. Don’t let the forb classification intimidate you – it simply means this is a soft-stemmed, herbaceous plant without woody tissue, much like your favorite garden herbs and wildflowers.

The plant produces clusters of small, tubular flowers that typically bloom in shades of blue to purple, arranged in the characteristic coiled clusters that make phacelias so distinctive. These spiral flower arrangements unfurl as they bloom, creating an almost hypnotic pattern that pollinators absolutely adore.

Why Grow Robbins’ Phacelia?

Despite its small stature, this native wildflower punches above its weight when it comes to garden benefits:

  • Pollinator magnet: Bees, butterflies, and other beneficial insects flock to phacelia flowers
  • Low maintenance: Once established, it requires minimal care
  • Drought tolerant: Perfect for water-wise gardening
  • Conservation value: You’re helping preserve a rare native species
  • Natural fit: Ideal for prairie restorations and native plant gardens

Perfect Garden Situations

Robbins’ phacelia thrives in:

  • Native wildflower gardens
  • Prairie restoration projects
  • Pollinator gardens
  • Xeriscaped landscapes
  • Naturalized areas
  • Educational or demonstration gardens focused on conservation

Growing Conditions and Care

This prairie native appreciates growing conditions that mimic its natural habitat. Plant it in full sun locations with well-draining soil. Robbins’ phacelia is adapted to USDA hardiness zones 6-9, covering most of its native range.

The best approach is direct sowing, either in fall or early spring. Like many prairie natives, the seeds may benefit from a period of cold stratification, which naturally occurs with fall planting. Once established, this drought-tolerant wildflower needs very little intervention from you – just the way nature intended.

A Word About Responsible Sourcing

Here’s the important part: given its rare status, never collect seeds or plants from wild populations. Instead, seek out native plant societies, conservation organizations, or specialty nurseries that offer responsibly propagated material. Some botanical gardens and universities also maintain seed banks for conservation purposes.

If you can’t find Robbins’ phacelia, consider other Phacelia species native to your area, or explore other native annuals that provide similar pollinator benefits.

The Bottom Line

Robbins’ phacelia might be small and somewhat challenging to source, but for gardeners passionate about native plants and conservation, it represents something special – a chance to nurture a rare piece of our natural heritage right in your backyard. With minimal care requirements and maximum ecological benefits, it’s a worthy addition to any native plant enthusiast’s garden, provided you can source it responsibly.

Remember, every garden that includes rare native species like Robbins’ phacelia becomes a small sanctuary, helping ensure these botanical treasures continue to grace our landscapes for generations to come.

Robbins’ Phacelia

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

Solanales

Family

Hydrophyllaceae R. Br. - Waterleaf family

Genus

Phacelia Juss. - phacelia

Species

Phacelia strictiflora (Engelm. & A. Gray) A. Gray - prairie phacelia

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