North America Non-native Plant

Silvergrass

Botanical name: Miscanthus capensis

USDA symbol: MICA16

Habit: grass

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

Synonyms: Miscanthidium capense (Nees) Stapf (MICA18)   

Silvergrass: The Mysterious Miscanthus capensis If you’ve stumbled across the name silvergrass or Miscanthus capensis in your gardening research, you might be scratching your head trying to find solid information about this elusive grass species. You’re not alone! This particular member of the Miscanthus family is something of an enigma ...

Silvergrass: The Mysterious Miscanthus capensis

If you’ve stumbled across the name silvergrass or Miscanthus capensis in your gardening research, you might be scratching your head trying to find solid information about this elusive grass species. You’re not alone! This particular member of the Miscanthus family is something of an enigma in the gardening world.

What We Know About Silvergrass

Miscanthus capensis, commonly called silvergrass, is a grass species that belongs to the larger Miscanthus genus. You might also see it listed under its botanical synonym, Miscanthidium capense. Like other members of its family, it’s a true grass (part of the Poaceae family), which means it shares characteristics with the more familiar ornamental grasses you might already know and love.

The Geographic Mystery

Here’s where things get interesting – and frustrating for curious gardeners. The specific native range and geographic distribution of Miscanthus capensis remain largely undocumented in readily available sources. The capensis part of its scientific name suggests a connection to the Cape region of South Africa, but without concrete documentation, we can’t say for certain where this grass originally calls home.

Why Information is So Scarce

You might wonder why there’s so little information available about this plant. There are a few possible explanations:

  • It might be a rarely cultivated species with limited horticultural use
  • It could be confused with or overshadowed by more common Miscanthus species
  • The plant might be primarily of botanical interest rather than garden interest
  • It may have limited distribution in its native habitat

Should You Try Growing Silvergrass?

This is where honest gardening advice gets a bit tricky. Without knowing the plant’s growing requirements, hardiness zones, mature size, or potential invasive tendencies, it’s difficult to recommend Miscanthus capensis for home gardens. If you’re set on growing a Miscanthus species, you might be better served by choosing one of the well-documented varieties like:

  • Miscanthus sinensis (Chinese silvergrass) – widely available with known growing requirements
  • Miscanthus sacchariflorus – another well-studied option with clear cultivation guidelines

The Bottom Line for Gardeners

While the mystery surrounding Miscanthus capensis might appeal to adventurous gardeners who love a botanical puzzle, the lack of available growing information makes it a risky choice for most home landscapes. Without knowing its mature size, spreading habits, hardiness zones, or care requirements, you’d essentially be conducting a garden experiment.

If you do encounter this plant for sale or find seeds, proceed with caution and perhaps treat it as a container specimen first. This way, you can observe its growth habits and requirements without committing to a permanent landscape installation.

When Less Information Means More Caution

In the gardening world, sometimes the plants we can’t find much information about are the ones that require the most careful consideration. Whether Miscanthus capensis is simply understudied or potentially problematic, the smart gardener’s approach is to choose plants with well-documented characteristics and proven garden performance.

If you’re drawn to ornamental grasses (and who isn’t – they’re absolutely wonderful!), stick with the tried-and-true species where you’ll find plenty of growing guides, troubleshooting tips, and fellow gardeners to share experiences with. Your garden – and your gardening confidence – will thank you for it.

Silvergrass

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

Miscanthus Andersson - silvergrass

Species

Miscanthus capensis (Nees) Andersson - silvergrass

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