North America Native Plant

Great Valley Phacelia

Botanical name: Phacelia ciliata var. ciliata

USDA symbol: PHCIC2

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Great Valley Phacelia: A Native Annual Worth Knowing Meet Great Valley phacelia (Phacelia ciliata var. ciliata), a charming native annual that might just be one of the most under-documented gems in the wildflower world. While this little forb may not be stealing the spotlight in garden centers, it represents an ...

Great Valley Phacelia: A Native Annual Worth Knowing

Meet Great Valley phacelia (Phacelia ciliata var. ciliata), a charming native annual that might just be one of the most under-documented gems in the wildflower world. While this little forb may not be stealing the spotlight in garden centers, it represents an interesting piece of North America’s native plant puzzle.

What Makes Great Valley Phacelia Special?

This native beauty belongs to the broader Phacelia family, known for their delicate flowers and wildlife-friendly nature. As an annual forb, Great Valley phacelia completes its entire life cycle in one growing season, making it a perfect candidate for gardeners who enjoy the excitement of replanting and watching their gardens evolve year after year.

Being a forb means this plant lacks the woody tissue you’d find in shrubs or trees. Instead, it’s a soft-stemmed vascular plant that puts all its energy into producing flowers and seeds before winter arrives.

Where Does It Call Home?

Great Valley phacelia has an interesting native range that spans from California all the way to New York. This coast-to-coast distribution suggests it’s quite adaptable, though specific habitat preferences for this particular variety remain somewhat mysterious in the botanical literature.

The Honest Truth About Growing Great Valley Phacelia

Here’s where we need to be upfront: while this plant is definitely native and worth celebrating, specific growing information for Phacelia ciliata var. ciliata is surprisingly scarce. This doesn’t mean it’s not worth growing—it just means you might be embarking on a bit of a gardening adventure!

What We Know (And What We Don’t)

Here’s what we can tell you with confidence:

  • It’s an annual, so expect to replant each year
  • It’s native to North America, making it an eco-friendly choice
  • As a forb, it likely prefers sunny to partially sunny conditions
  • Being part of the Phacelia genus, it probably attracts beneficial insects

What remains a bit of a mystery:

  • Specific soil preferences
  • Exact growing conditions and care requirements
  • Mature size and growth habits
  • Specific wildlife benefits

Should You Plant Great Valley Phacelia?

If you’re someone who enjoys native plants and doesn’t mind a little horticultural detective work, Great Valley phacelia could be a wonderful addition to your garden. Since it’s native and not listed as invasive or noxious, there’s no ecological concern about growing it.

This plant might be perfect for:

  • Native plant enthusiasts looking to try something unique
  • Gardeners interested in supporting local ecosystems
  • Those who enjoy annual flowers and don’t mind replanting
  • Wildflower garden creators seeking authentic regional species

Finding and Growing Your Great Valley Phacelia

The biggest challenge you’ll face is actually finding seeds or plants for sale. This isn’t exactly a mainstream garden center staple! Your best bet is specialty native plant nurseries or seed companies that focus on regional native species.

When you do find seeds, treat them like you would other annual wildflowers: plant in spring after the last frost, provide moderate water until established, and enjoy watching your garden experiment unfold.

The Bottom Line

Great Valley phacelia represents the wonderful diversity of North America’s native flora, even if it hasn’t gotten much attention from garden writers and researchers. Sometimes the most rewarding gardening experiences come from growing plants that aren’t in every gardening book. If you’re up for a little botanical adventure and want to support native biodiversity, this charming annual might just surprise you.

Just remember: with limited growing information available, you’ll be part researcher, part gardener. Document your experiences—you might be contributing valuable knowledge about this under-studied native beauty!

Great Valley 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 ciliata Benth. - Great Valley phacelia

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