North America Native Plant

Marl Yelloweyed Grass

Botanical name: Xyris calcicola

USDA symbol: XYCA2

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Marl Yelloweyed Grass: Florida’s Delicate Wetland Beauty If you’re drawn to Florida’s unique wetland ecosystems and love supporting native plants, marl yelloweyed grass (Xyris calcicola) might just capture your gardening heart. This charming little perennial is as specialized as its name suggests – it’s perfectly adapted to Florida’s distinctive calcareous ...

Marl Yelloweyed Grass: Florida’s Delicate Wetland Beauty

If you’re drawn to Florida’s unique wetland ecosystems and love supporting native plants, marl yelloweyed grass (Xyris calcicola) might just capture your gardening heart. This charming little perennial is as specialized as its name suggests – it’s perfectly adapted to Florida’s distinctive calcareous wetlands and offers a delicate beauty that’s hard to find elsewhere.

What Makes Marl Yelloweyed Grass Special

Marl yelloweyed grass is a true Florida native, found exclusively in the Sunshine State. This perennial forb – essentially a non-woody plant that lacks significant woody tissue – brings a subtle elegance to wetland areas with its grass-like foliage and petite yellow flowers that dance on slender stems.

As a member of the yelloweyed grass family, this plant produces small but cheerful blooms that may seem modest at first glance, but they’re perfectly designed to attract Florida’s native pollinators, including small native bees and other tiny beneficial insects.

Where You’ll Find This Florida Native

Marl yelloweyed grass calls Florida home, and only Florida. This endemic species has evolved specifically for the state’s unique calcareous wetland environments, making it a true treasure of Florida’s natural heritage.

Should You Grow Marl Yelloweyed Grass?

Here’s where things get interesting – and a bit challenging. While marl yelloweyed grass is undeniably beautiful and ecologically valuable, it’s not your typical garden plant. This specialized beauty has very specific needs that can be tough to replicate in a home landscape.

The Pros:

  • Supports native Florida ecosystems and biodiversity
  • Attracts small native pollinators
  • Adds authentic Florida character to appropriate spaces
  • Perennial growth means it returns year after year
  • Perfect for wetland restoration projects

The Challenges:

  • Requires very specific wetland conditions
  • Needs consistently moist to wet, alkaline soils
  • Can be difficult to source commercially
  • Not suitable for typical garden beds

Growing Conditions and Care

If you’re up for the challenge and have the right conditions, marl yelloweyed grass thrives in USDA hardiness zones 9-11, which aligns perfectly with Florida’s climate. The key to success lies in mimicking its natural habitat:

  • Soil: Consistently moist to wet, alkaline (calcareous) soils
  • Light: Full sun to partial shade
  • Water: Constant moisture is essential – think bog-like conditions
  • pH: Alkaline conditions (high pH) are crucial

Best Garden Settings

Marl yelloweyed grass isn’t for every garden, but it can be spectacular in the right setting:

  • Bog gardens or constructed wetlands
  • Rain gardens with consistently wet areas
  • Native plant gardens focusing on wetland species
  • Wetland restoration projects
  • Educational gardens showcasing Florida’s unique ecosystems

Planting and Care Tips

Growing marl yelloweyed grass successfully requires patience and the right setup:

  • Source plants responsibly from native plant nurseries specializing in wetland species
  • Ensure your planting area stays consistently moist – never let it dry out
  • Test soil pH to confirm alkaline conditions
  • Consider container growing in a water garden setup if ground conditions aren’t suitable
  • Be patient – this plant grows at its own pace and may take time to establish

The Bottom Line

Marl yelloweyed grass is a plant for the dedicated native plant enthusiast who has the right conditions or is willing to create them. While it’s not the easiest plant to grow, it offers something truly special – a direct connection to Florida’s unique wetland ecosystems and the satisfaction of supporting a plant found nowhere else on Earth.

If wetland gardening isn’t your thing, consider other native Florida plants that are easier to grow but still support local ecosystems. But if you’re passionate about wetland conservation and have the right conditions, marl yelloweyed grass could be a rewarding addition to your native plant collection.

Marl Yelloweyed Grass

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Commelinales

Family

Xyridaceae C. Agardh - Yellow-eyed Grass family

Genus

Xyris L. - yelloweyed grass

Species

Xyris calcicola E.L. Bridges & Orzell - marl yelloweyed grass

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