Native Plants

Henderson’s Bentgrass

Agrostis hendersonii

USDA symbol: AGHE3

annual grass

Lower 48 states: native

If you’re passionate about native plants and live along the Pacific Coast, Henderson’s bentgrass might just be the understated gem your garden has been waiting for. This delicate annual grass may not win any flashy flower contests, but it brings something far more valuable to the table: authentic regional character ...

Henderson’s Bentgrass may be listed as rare in your area.
Global Conservation Status

Status: S1Q | Critically imperiled: Typically 5 or fewer occurrences or under 1,000 remaining individuals.

Henderson’s Bentgrass: A Rare Native Treasure for Pacific Coast Gardens

If you’re passionate about native plants and live along the Pacific Coast, Henderson’s bentgrass might just be the understated gem your garden has been waiting for. This delicate annual grass may not win any flashy flower contests, but it brings something far more valuable to the table: authentic regional character and ecological integrity.

What Makes Henderson’s Bentgrass Special?

Henderson’s bentgrass (Agrostis hendersonii) is a charming little annual grass that’s as authentic as they come. Native exclusively to California and Oregon, this fine-textured grass represents the true spirit of Pacific Coast ecosystems. Unlike its more common cousins, Henderson’s bentgrass has stayed true to its roots – quite literally.

You might also encounter this plant referenced by its botanical synonyms Agrostis aristiglumis or Agrostis microphylla var. hendersonii in older plant references, but rest assured, they’re all talking about the same delightful grass.

  • Species observed
  • No observations

A Word of Caution: Rarity Matters

Here’s where we need to have a serious chat. Henderson’s bentgrass carries a Global Conservation Status of S1Q, which means it’s rare and its status is somewhat uncertain. This isn’t a plant you’ll find at your local nursery, and that’s actually a good thing. If you’re interested in growing this native beauty, you’ll need to source it responsibly through native plant societies, seed exchanges, or specialized native plant nurseries that can guarantee ethical collection practices.

Growing Henderson’s Bentgrass: The Practical Details

This annual grass thrives in USDA hardiness zones 8-10, making it perfect for milder coastal climates. As a facultative wetland species, Henderson’s bentgrass has some specific preferences that are actually quite manageable:

  • Prefers moist to seasonally wet soils
  • Tolerates both partial shade and full sun
  • Grows best with consistent moisture during establishment
  • Completes its life cycle within one growing season

Where Does It Fit in Your Garden?

Henderson’s bentgrass isn’t going to be your showstopper centerpiece, and that’s perfectly fine. This grass excels in supporting roles:

  • Native plant gardens where authenticity matters
  • Restoration projects focusing on regional ecosystems
  • Naturalized areas that mimic wild coastal habitats
  • Erosion control on gentle slopes with adequate moisture

The Wildlife Connection

While Henderson’s bentgrass is wind-pollinated and doesn’t directly attract pollinators like a wildflower would, it serves the ecosystem in other important ways. As a native grass, it provides habitat structure and likely supports various insects and small wildlife that depend on authentic regional plant communities.

Planting and Care Tips

Growing Henderson’s bentgrass successfully is all about timing and moisture:

  • Direct seed in fall for best results
  • Ensure consistent soil moisture during germination and establishment
  • Allow plants to complete their natural cycle and self-seed
  • Avoid fertilizing – native grasses prefer lean soils
  • Be patient – this grass works on nature’s timeline, not ours

Is Henderson’s Bentgrass Right for Your Garden?

This grass is perfect for you if you’re committed to growing truly native plants and understand the responsibility that comes with cultivating rare species. It’s ideal for gardeners who appreciate subtle beauty and want to support authentic regional ecosystems.

However, if you’re looking for dramatic visual impact or need a grass that’s readily available and easy to source, you might want to consider other native Pacific Coast grasses that are more common and equally valuable to local ecosystems.

Remember, choosing to grow Henderson’s bentgrass means becoming a steward of a rare plant. Source responsibly, grow thoughtfully, and help ensure this little grass continues to grace Pacific Coast landscapes for generations to come.

Agrostis hendersonii is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Agrostis hendersonii is also known as:

Agrostis aristiglumis | USDA symbol: AGAR2
Agrostis microphylla var. hendersonii | USDA symbol: AGMIH

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Monocot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Liliopsida - Monocotyledons
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae Barnhart - Grass family
Genus: Agrostis L. - bentgrass

Species: Agrostis hendersonii Hitchc. - Henderson's bentgrass

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