North America Native Plant

Rich’s Seepweed

Botanical name: Suaeda maritima richii

USDA symbol: SUMAR

Life cycle: perennial

Habit: subshrub

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Suaeda richii Fernald (SURI)   

Rich’s Seepweed: A Hardy Coastal Native for Specialized Gardens If you’re gardening near the coast and struggling with salt spray, sandy soil, and harsh maritime conditions, Rich’s seepweed (Suaeda maritima richii) might just be the unsung hero your landscape needs. This tough little perennial doesn’t win any beauty contests, but ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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. ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Rich’s Seepweed: A Hardy Coastal Native for Specialized Gardens

If you’re gardening near the coast and struggling with salt spray, sandy soil, and harsh maritime conditions, Rich’s seepweed (Suaeda maritima richii) might just be the unsung hero your landscape needs. This tough little perennial doesn’t win any beauty contests, but what it lacks in flashy flowers, it makes up for in pure coastal resilience.

What is Rich’s Seepweed?

Rich’s seepweed is a perennial forb herb that’s perfectly adapted to life by the sea. Also known scientifically as Suaeda richii Fernald, this native plant is built for survival in conditions that would make most garden plants wave the white flag. As a member of the goosefoot family, it has that distinctive succulent-like appearance that helps it conserve water and tolerate salt.

Where Does It Call Home?

This maritime specialist is native to both Canada and the northeastern United States. You’ll find it naturally growing along the coasts of Nova Scotia, Prince Edward Island, Maine, Massachusetts, New Hampshire, Pennsylvania, and Newfoundland. It’s perfectly at home in salt marshes, coastal meadows, and anywhere the ocean’s influence is strong.

A Word of Caution: This One’s Getting Rare

Here’s where we need to pump the brakes a bit. Rich’s seepweed carries a Global Conservation Status of S5T3, which indicates some level of conservation concern. If you’re interested in adding this plant to your coastal garden, please make sure you source it responsibly from reputable native plant nurseries rather than collecting from wild populations. Every little bit helps when it comes to protecting our native coastal flora.

Why Would You Want Rich’s Seepweed?

Let’s be honest – Rich’s seepweed isn’t going to be the star of your Instagram garden photos. But here’s why coastal gardeners should give it serious consideration:

  • Ultimate salt tolerance: This plant actually thrives in saline conditions that kill most other plants
  • Low maintenance: Once established, it pretty much takes care of itself
  • Native credentials: Supporting local ecosystems by planting native species
  • Erosion control: Helps stabilize coastal soils with its root system
  • Authentic coastal look: Perfect for naturalistic seaside landscapes

Growing Rich’s Seepweed Successfully

Ideal Growing Conditions

Rich’s seepweed is happiest in conditions that mirror its natural coastal habitat. Think full sun, saline soils, and good drainage. It thrives in USDA hardiness zones 3-7, making it suitable for most northeastern coastal areas where it naturally occurs.

Planting Tips

  • Choose a sunny location with good drainage
  • Saline or brackish conditions are preferred – this isn’t a plant for inland freshwater gardens
  • Plant in spring after the last frost
  • Space plants according to mature spread (specific dimensions vary, but give them room to establish)

Care and Maintenance

The beauty of Rich’s seepweed lies in its low-maintenance nature. Once established, it requires minimal care. Avoid overwatering or adding fertilizers – this plant is adapted to lean, salty conditions and too much pampering can actually harm it.

Garden Design Ideas

Rich’s seepweed works best in specialized coastal gardens where its unique adaptations can shine. Consider using it in:

  • Salt marsh restoration projects
  • Coastal erosion control plantings
  • Naturalistic seaside landscapes
  • Native plant gardens near the coast
  • Low-maintenance coastal groundcover areas

The Bottom Line

Rich’s seepweed isn’t for every garden or every gardener. But if you’re dealing with coastal conditions and want to support native plant communities, this tough little perennial deserves consideration. Just remember to source it responsibly and give it the specialized growing conditions it needs to thrive. Your coastal garden – and local ecosystem – will thank you for choosing this authentic maritime native.

Rich’s Seepweed

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Caryophyllales

Family

Chenopodiaceae Vent. - Goosefoot family

Genus

Suaeda Forssk. ex J.F. Gmel. - seepweed

Species

Suaeda maritima (L.) Dumort. - herbaceous seepweed

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