North America Non-native Plant

Thimble Grass

Botanical name: Fingerhuthia sesleriiformis

USDA symbol: FISE2

Habit: grass

Native status: Not native but doesn't reproduce and persist in the wild

Thimble Grass: A Mysterious Native Grass Worth Investigating If you’ve stumbled upon the name thimble grass (Fingerhuthia sesleriiformis) in your gardening research, you’ve discovered one of those intriguing plants that seems to fly under the radar. This grass-like species belongs to the world of graminoids – that diverse group of ...

Thimble Grass: A Mysterious Native Grass Worth Investigating

If you’ve stumbled upon the name thimble grass (Fingerhuthia sesleriiformis) in your gardening research, you’ve discovered one of those intriguing plants that seems to fly under the radar. This grass-like species belongs to the world of graminoids – that diverse group of plants that includes true grasses, sedges, and rushes that form the backbone of many natural ecosystems.

What We Know About Thimble Grass

Thimble grass falls into the category of graminoid plants, which means it shares characteristics with other grass-like species that are often the unsung heroes of the plant world. These plants typically feature narrow, blade-like leaves and can add wonderful texture and movement to garden spaces.

However, here’s where things get interesting (and a bit mysterious): detailed information about Fingerhuthia sesleriiformis is surprisingly scarce in standard botanical references. This could mean several things – it might be a very specialized or rare species, it could be known by other names in different regions, or there might be some taxonomic confusion around its classification.

The Challenge of Limited Information

When it comes to specific details about thimble grass’s native range, growing conditions, and garden performance, reliable information is hard to come by. We don’t have clear data on:

  • Its natural geographic distribution
  • Preferred growing conditions and soil requirements
  • USDA hardiness zones
  • Mature size and growth rate
  • Specific wildlife or pollinator benefits

Should You Plant Thimble Grass?

Given the limited information available, approaching thimble grass with caution and curiosity is the wise path. If you’re considering adding this plant to your garden, here are some important steps to take first:

  • Verify the plant’s identity with local botanists or extension services
  • Check with your local native plant society about its status in your area
  • Confirm it’s not listed as invasive or noxious in your region
  • If it is indeed rare, ensure any plant material is ethically and responsibly sourced

Alternative Grass Options

While you’re investigating thimble grass, consider these well-documented native grass alternatives that can provide similar aesthetic appeal:

  • Local native bunch grasses suited to your region
  • Sedges (Carex species) for similar texture with proven garden performance
  • Regional prairie grasses that support local wildlife

The Bottom Line

Thimble grass represents one of those fascinating botanical puzzles that remind us how much we still have to learn about the plant world. While its mysterious nature makes it difficult to recommend outright, it also makes it an intriguing subject for plant enthusiasts who enjoy a good botanical detective story.

If you do encounter this plant in the wild or find reliable sources for it, approach with the respect due to any potentially rare species. Always prioritize well-documented native plants for your garden foundation, and consider thimble grass as a possible specialty addition only after thorough research and verification.

Sometimes the most interesting plants are the ones that keep a few secrets – just make sure you do your homework before bringing any mystery plant home to your garden!

Thimble 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

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Fingerhuthia Nees - Zulu fescue

Species

Fingerhuthia sesleriiformis Nees - thimble grass

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