How to Grow Climax Timothy

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Climax Timothy

Phleum pratense var. Climax

grass

Climax Timothy is a perennial cool-season grass variety bred for superior forage production and nutritional quality. It is widely used as a hay and pasture grass, particularly valued for its high yield, disease resistance, and palatability to livestock. This cultivar is an improvement over standard timothy grass with better stand persistence and feed quality.

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Example Climax Timothy timeline · Pittsburgh, PA (Zone 6b)

Plant Climax Timothy
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Climax Timothy
Around Jun 16

≈ 60 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Climax Timothy dates for your own zip code.

Growing Conditions

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Sun: Full sun, 6+ hours daily (tolerates partial shade but performs best in full sun)

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Water: Moderate moisture; prefers consistent moisture during establishment and growth. Drought-tolerant once established but performs best with 15-25 inches of annual precipitation.

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Spacing: 6-8 inches (seeding rate typically 10-15 lbs per acre for forage) inches

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Days to maturity: 60-90 days to first harvest (60-75 days from spring to boot stage/heading)

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Planting depth: 0.25-0.5 inches (shallow seeding, should be barely covered)

Soil

Type: Well-draining loamy soil, tolerates clay loams and slightly moist soils

pH: 6.0-7.0

Amendments:

Compost or well-rotted manure for initial establishment Phosphorus and potassium fertilizers

Growing Zones

Find your zone →

Thrives in zones 2-7, with excellent performance in cool-season regions

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b

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Growth Stages

Germination & Seedling

1-2 weeks

Tiny seedlings emerge with fine, narrow leaves. Very delicate stage with minimal root development.

Keep soil consistently moist but not waterlogged. Avoid heavy foot traffic. Protect from intense direct sun if newly seeded in hot weather.

Vegetative Establishment

3-6 weeks

Young plants develop tillers (shoots) and a more robust root system. Leaf blades become more prominent and the plant spreads laterally.

Ensure adequate moisture and light. Begin light grazing or mowing only after plants are well-rooted (4-6 weeks). Avoid heavy grazing during first season.

Vegetative Growth

4-8 weeks

Dense tiller formation with vigorous leaf production. Plant height increases to 12-18 inches. Rich green color indicates healthy growth.

Apply moderate nitrogen fertilizer (40-50 lbs N/acre in spring). Maintain consistent moisture. Monitor for diseases in humid conditions.

Boot to Heading

2-3 weeks

Seed head emerges from the leaf sheath and extends upward. Characteristic dense, cylindrical panicles form (the distinctive timothy seed head).

Stop grazing to allow head development. Do not apply heavy nitrogen now, which delays maturity. Monitor moisture levels.

Bloom & Maturity

1-2 weeks (for optimal hay harvest window)

Seed head fully emerged and in anthesis (flowering). Seed heads are dense, 1-3 inches long, dark purple-brown. Ideal hay harvest stage occurs late bloom to early seed stage.

Harvest for hay at late bloom stage for best forage quality. Delay harvest beyond this stage for seed production but quality declines. Cut when seed heads are fully visible.

Companion Planting

Plan your garden →

Plant with:

Alfalfa Red clover White clover Orchard grass Smooth brome Birdsfoot trefoil

Avoid planting near:

Recently planted legumes in monoculture (timothy can outcompete on poor soils) Fields with known timothy allelopathy issues

Common Pests

Monitor for defoliation damage; use parasitoid wasps or Bacillus thuringiensis (Bt) sprays if damage exceeds 30% leaf area loss. Timely harvest removes feeding larvae.
Maintain adequate irrigation to reduce stress. Control with insecticidal soaps or neem oil if population is high. Improve overall plant vigor.
Remove affected tillers; ensure good field sanitation. Not usually economically damaging in forage situations.
Select disease-resistant varieties like Climax; ensure good air circulation and avoid excessive nitrogen. Remove ergot bodies before feeding to livestock (toxic).

Uses

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Premium Livestock Hay

Culinary

Climax timothy is the gold standard forage for horses, cattle, sheep, and goats. Its digestibility and nutrient content make it ideal for hay production, and it maintains quality well in storage. [source]

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Pasture and Grazing

Culinary

Used extensively for rotational grazing systems and permanent pastures. Animals readily consume it, and Climax's vigor and persistence support repeated grazing. [source]

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Seed Production

Household

Climax timothy produces high-quality seed for commercial sale, supporting agriculture and forage supply chains. Seed is harvested when fully mature and dark in color. [source]

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Wildlife Habitat and Food

Wildlife

Provides cover and seed food for grassland birds, game birds, and small mammals. Used in Conservation Reserve Program (CRP) plantings for ecosystem support. [source]

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Soil Conservation & Erosion Control

Household

Dense root system and perennial nature stabilize soil and prevent erosion on slopes and in riparian areas. Used in conservation buffers and filter strips. [source]

Harvest Tips

For hay: Harvest at late bloom to early seed stage (typically late June to early July in northern regions) when nutritional quality is highest. Cut when seed heads are fully visible and dark purple. For multiple harvests, first cut at boot to early bloom; second cut can follow 4-6 weeks later if moisture and fertility permit. Climax timothy typically yields 2-3.5 tons dry matter per acre depending on conditions. For seed production, allow full maturity before combining (August-September). Allow hay to dry to 15-20% moisture before baling to prevent mold.

Fun Facts

🌱 Climax timothy was developed through selective breeding to improve upon standard timothy grass, offering significantly higher forage yield and disease resistance while maintaining the nutritional quality horses require.
🌱 Timothy grass is named after Timothy Hanson, an 18th-century American farmer who promoted its use in New England; 'timothy' became the common name, and the crop became iconic in American and Canadian agriculture.
🌱 A single timothy plant can produce hundreds of tillers, and each tiller can produce 10,000+ seeds if allowed to fully mature, making it an extremely prolific and persistent species.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Annual Cultivar Full Sun Partial Shade Perennial

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