North America Native Plant

Stonecrop Phacelia

Botanical name: Phacelia saxicola

USDA symbol: PHSA

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Stonecrop Phacelia: A Lesser-Known Native Wildflower Worth Discovering If you’re looking to expand your native plant palette beyond the usual suspects, let me introduce you to stonecrop phacelia (Phacelia saxicola). This unassuming annual wildflower might not be the showiest plant in your garden, but it represents the kind of hidden ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ 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 ⚘

Stonecrop Phacelia: A Lesser-Known Native Wildflower Worth Discovering

If you’re looking to expand your native plant palette beyond the usual suspects, let me introduce you to stonecrop phacelia (Phacelia saxicola). This unassuming annual wildflower might not be the showiest plant in your garden, but it represents the kind of hidden gem that makes native gardening so rewarding – and important for local ecosystems.

Meet the Stonecrop Phacelia

Stonecrop phacelia is a native annual forb, meaning it’s a non-woody flowering plant that completes its entire life cycle in one growing season. As part of the larger Phacelia genus, it belongs to a family of plants beloved by pollinators, though this particular species remains somewhat mysterious in the gardening world.

Where You’ll Find It Growing Wild

This southwestern native calls Arizona, California, and Nevada home, thriving in the diverse landscapes of these three states. It’s perfectly adapted to the challenging conditions of the American Southwest, from desert margins to rocky slopes.

Why Consider Growing Stonecrop Phacelia?

Here’s where things get interesting – and important. Stonecrop phacelia carries a Global Conservation Status of S3?, which essentially means its conservation status is undefined or uncertain. This makes it a plant worth paying attention to, both for conservation and gardening purposes.

The Responsible Approach

If you’re intrigued by this native annual, here are the key considerations:

  • Source responsibly: Only purchase or grow stonecrop phacelia from reputable native plant nurseries that can verify sustainable collection practices
  • Support local ecosystems: Growing native plants like this helps maintain genetic diversity and supports regional wildlife
  • Garden role: As an annual forb, it can fill gaps in native plant gardens and naturalized areas

What We Know (And Don’t Know) About Growing It

Here’s the honest truth: specific cultivation information for stonecrop phacelia is limited. This isn’t uncommon for lesser-known native species that haven’t made their way into mainstream horticulture. What we do know is that as a southwestern native annual, it likely prefers:

  • Well-draining soils
  • Full sun to partial shade
  • Minimal water once established
  • Rocky or sandy soil conditions

The Bigger Picture

While stonecrop phacelia might not be the easiest plant to find or grow, it represents something important in native gardening: the value of supporting lesser-known species. Many Phacelia species are excellent pollinator plants, and this one likely shares some of those beneficial traits.

If you can’t locate stonecrop phacelia or want more reliable alternatives, consider other native Phacelia species in your region, or explore other native annuals that support local ecosystems and provide similar ecological benefits.

The Bottom Line

Stonecrop phacelia may be a bit of a gardening adventure – one of those plants that requires patience, research, and responsible sourcing. But for dedicated native plant enthusiasts, especially those in the Southwest, it represents an opportunity to support a potentially vulnerable species while adding authentic local character to their landscapes.

Sometimes the most rewarding plants aren’t the ones with the flashiest flowers or the easiest care instructions. Sometimes they’re the quiet natives that remind us there’s still so much to discover and protect in our local plant communities.

Stonecrop 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 saxicola A. Gray - stonecrop phacelia

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