Phleum pratense
Photo: Анна МитрошенковаCC BY 4.0
grass

Timothy Grass

Phleum pratense

The Story

Plant Bio

Phleum pratense, commonly known as Timothy grass, is a hardy perennial bunchgrass native to Europe and Asia that forms dense, upright tufts of hairless green foliage. In summer, it produces distinctive, tightly packed cylindrical flower spikes that resemble a cat's tail, maturing from green to a soft purplish hue.

This species is highly valued for its cold hardiness and adaptability to heavy, moist clay soils where other grasses struggle. It spreads slowly via short rhizomes and corms, making it an effective choice for soil stabilization and naturalized meadows.

Uses & Benefits:

Ornamental UsesProvides a wild, naturalistic texture with distinctive cylindrical flower spikes that persist into fall.
Practical UsesExcellent for erosion control on slopes and stabilizing heavy clay soils due to its dense fibrous root system.
Ecological BenefitsProvides valuable nesting material and cover for small mammals, while its seeds feed granivorous birds.

Essentials

At a Glance

Plant Type

Grass

Height

60"

Width

39"

Light

Full Sun

Zones

4, 5, 6, 7, 8, 9

Water

Medium

Humidity

Moderate

Lifespan

Perennial

Native To

Europe and Asia

Toxicity

Non-toxic

Bloom period

Summer – Fall

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F
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A
M
J
J
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In flower about 6 months of the year

Planting

How to Grow

  1. Sow seeds directly into prepared, moist soil in early spring or early fall when temperatures are cool.
  2. Select a site in full sun with heavy, fertile loam or clay that retains moisture but drains reasonably well.
  3. Water regularly during the first growing season to establish a deep, resilient root system.
  4. Cut back the dead foliage to just above the crown in late winter to clear the way for fresh spring growth.

Pro Tip

Avoid scalping the plant below the crown when cutting back old foliage, as this severely weakens the root system and slows spring recovery.

Keep It Thriving

Care Guide

Do

  • Grow in full sun to maintain an upright, sturdy habit.
  • Keep the soil consistently moist, especially during dry summer spells.
  • Mow or cut back after flowering if you wish to prevent self-seeding in surrounding beds.

Don't

  • Do not plant this grass near areas where severe hay fever sufferers spend time, as it produces highly allergenic wind-borne pollen.
  • Do not allow the soil to become completely waterlogged for extended periods.
  • Do not apply heavy fertilizers to garden specimens, as they perform best with minimal supplemental feeding.

Seasonal Care Calendar

TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deadhead
Pest Check
Propagate
Prune

Watch Out For

Pests & Diseases

Common Pests

In the Garden

Landscape Uses & Companions

Landscape Uses

Meadow plantingsErosion controlRain gardensNaturalized areas

Companion Plants

Trifolium pratenseMedicago sativa Elymus virginicusAchillea millefolium

Multiply

Propagation Methods

Good to Know

Common Questions

Timothy Grass questions

What zones can Timothy Grass grow in?

Timothy Grass is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Timothy Grass deer resistant?

Not reliably. Deer may browse Timothy Grass, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Timothy Grass bloom?

Timothy Grass typically blooms in summer through fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Timothy Grass need full sun?

Timothy Grass does best in full sun (6+ hours).

Keep exploring

Explore the genus

Grow Timothy Grass with confidence

See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.

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