North America Non-native Plant

Phleum Graecum

Botanical name: Phleum graecum

USDA symbol: PHGR27

Habit: grass

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

Phleum graecum: The Mystery Mediterranean Grass If you’ve stumbled across the name Phleum graecum in your botanical wanderings, you’ve discovered one of those intriguing plants that seems to exist more in scientific literature than in garden centers. This Mediterranean grass species is something of an enigma in the gardening world ...

Phleum graecum: The Mystery Mediterranean Grass

If you’ve stumbled across the name Phleum graecum in your botanical wanderings, you’ve discovered one of those intriguing plants that seems to exist more in scientific literature than in garden centers. This Mediterranean grass species is something of an enigma in the gardening world – it’s documented but rarely discussed, catalogued but seldom cultivated.

What We Know About This Elusive Grass

Phleum graecum belongs to the grass family (Poaceae), making it a true grass rather than a grass-like plant such as sedges or rushes. As its name suggests, this species has connections to Greece and the broader Mediterranean region, though specific distribution details remain somewhat mysterious in readily available sources.

Like other members of the Phleum genus, this grass is likely a relatively small, tufted species that produces the characteristic cylindrical flower heads that give timothy grasses their distinctive appearance. However, unlike its famous cousin Phleum pratense (common timothy), P. graecum remains largely outside mainstream horticulture.

Should You Try Growing It?

Here’s where things get interesting – and a bit challenging. The lack of readily available information about Phleum graecum’s specific growing requirements, hardiness zones, and garden performance makes it a risky choice for most gardeners. Without clear guidance on:

  • Preferred soil conditions
  • Moisture requirements
  • Cold hardiness limits
  • Mature size and spread
  • Potential invasiveness

You’d essentially be conducting your own gardening experiment. While that might appeal to adventurous plant collectors, most gardeners would be better served choosing well-documented native grasses for their region.

Better Alternatives for Mediterranean-Style Gardens

If you’re drawn to Mediterranean grasses for your landscape, consider these better-documented alternatives that offer similar aesthetic appeal with known growing requirements:

  • Native bunch grasses appropriate to your region
  • Well-behaved ornamental grasses with Mediterranean origins
  • Local native grasses that provide proven wildlife benefits

The Takeaway

Phleum graecum represents one of those botanical curiosities that remind us how much we still don’t know about the plant kingdom. While its scientific name appears in databases and taxonomic works, practical gardening information remains elusive. For most gardeners, this mystery grass is better appreciated from an academic distance while choosing better-documented species for actual cultivation.

If you do encounter seeds or plants labeled as Phleum graecum, proceed with caution. Without knowing its growth habits, potential invasiveness, or specific care requirements, you could be introducing an unpredictable element to your garden. Sometimes the most responsible choice is to admire a plant’s botanical intrigue while reaching for species we understand well enough to grow successfully and sustainably.

Phleum Graecum

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

Phleum L. - timothy

Species

Phleum graecum Boiss. & Heldr. [excluded]

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