North America Native Plant

Mono Phacelia

Botanical name: Phacelia monoensis

USDA symbol: PHMO11

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Mono Phacelia: A Rare Gem for Native Plant Enthusiasts If you’re on the hunt for a truly special native wildflower that’ll make your garden stand out from the crowd, let me introduce you to Mono phacelia (Phacelia monoensis). This charming little annual is one of those hidden treasures that serious ...

Rare plant alert!

Region: Conservation status by state

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

Mono Phacelia: A Rare Gem for Native Plant Enthusiasts

If you’re on the hunt for a truly special native wildflower that’ll make your garden stand out from the crowd, let me introduce you to Mono phacelia (Phacelia monoensis). This charming little annual is one of those hidden treasures that serious native plant gardeners absolutely adore – though you’ll need to be a bit of a plant detective to track it down!

What Makes Mono Phacelia Special?

Mono phacelia is a delightful forb – that’s garden-speak for a non-woody flowering plant that dies back to the ground each year. Think of it as nature’s own little fireworks show, popping up annually with clusters of gorgeous blue to purple flowers that spiral outward in those distinctive coiled arrangements that make Phacelia flowers so recognizable.

This beauty is proudly native to the lower 48 states, specifically calling California and Nevada home. You’ll find it naturally growing in the eastern Sierra Nevada region, particularly around Mono County (hence the name!), where it has adapted to some pretty tough mountain conditions.

A Word of Caution: Rarity Matters

Before you get too excited about adding this stunner to your garden, there’s something important you should know. Mono phacelia has a Global Conservation Status of S3, which means it’s considered vulnerable. With only 21 to 100 known occurrences and between 3,000 and 10,000 individuals in the wild, this little plant needs our help to stick around for future generations.

The bottom line? If you’re going to grow Mono phacelia (and I hope you do!), please make sure you’re getting your seeds or plants from reputable, ethical sources that don’t harvest from wild populations. Think of it as being a conservation superhero in your own backyard!

Why Your Garden (and Local Wildlife) Will Love It

Mono phacelia isn’t just a pretty face – it’s a pollinator magnet! Those spiraling clusters of blue-purple blooms are like a five-star restaurant for native bees, butterflies, and other beneficial insects. The flowers produce nectar that keeps our pollinator friends happy and well-fed, making your garden an important pit stop in their daily adventures.

From a design perspective, this annual works beautifully in:

  • Native plant gardens where you want authentic regional character
  • Rock gardens that need a splash of color
  • Xerophytic (drought-tolerant) landscapes
  • Naturalized wildflower meadows
  • Areas where you want seasonal interest without long-term commitment

Growing Your Own Mono Phacelia

Here’s where things get interesting – Mono phacelia is adapted to some pretty specific conditions, so success depends on mimicking its mountain home. This plant thrives in USDA hardiness zones 4-8, handling both cold winters and hot, dry summers like a champ.

Light requirements: Give it full sun to partial shade. It’s not picky, but it definitely appreciates good light.

Soil needs: Well-drained soil is absolutely critical. This plant comes from rocky, gravelly areas where water doesn’t stick around long. Heavy, soggy soil is a no-go.

Water wisdom: Once established, Mono phacelia is quite drought-tolerant. In fact, too much water can be more harmful than too little!

Planting and Care Tips

Since this is an annual, you’ll be starting fresh each year – but that’s part of the fun! Here’s how to give your Mono phacelia the best shot at success:

  • Timing: Direct seed in fall for best results, allowing natural winter stratification
  • Soil prep: Ensure excellent drainage – consider adding gravel or sand to heavy soils
  • Spacing: Give plants room to breathe; overcrowding invites problems
  • Watering: Water gently during establishment, then back off significantly
  • Maintenance: Minimal care needed – this plant prefers benign neglect!

The Verdict: Should You Grow Mono Phacelia?

If you’re a native plant enthusiast who loves supporting conservation efforts while creating habitat for pollinators, Mono phacelia could be a wonderful addition to your garden. Just remember that with great beauty comes great responsibility – source your plants ethically, and consider yourself a steward of this vulnerable species.

While it might take a bit more effort to find and grow successfully than your average garden center annual, the reward of those distinctive spiral flower clusters and the knowledge that you’re helping preserve a rare native plant makes it absolutely worthwhile. Plus, your local bees and butterflies will definitely thank you!

Mono 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 monoensis Halse - Mono phacelia

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