How to Grow Mixed Hay Grasses
Mixed Hay Grasses
Dactylis glomerata (Orchardgrass), Phleum pratense (Timothy), Bromus species (Bromegrass)
grassA forage grass mixture combining three cool-season perennial grasses commonly used for hay production and pasture. These species are selected together for complementary growth patterns, nutritional quality, and seasonal productivity, creating a balanced feed source for livestock.
When should you plant Mixed Hay Grasses in your zone?
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Example Mixed Hay Grasses timeline · Pittsburgh, PA (Zone 6b)
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Plant Mixed Hay Grasses
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Mixed Hay Grasses
Around Aug 15≈ 120 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Zones 3-7 are optimal; timothy and orchardgrass thrive in cooler climates, bromegrass extends adaptation to zone 2
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Get my Mixed Hay Grasses timeline →Growth Stages
Germination & Seedling
7-14 daysFine-leaved shoots emerge as thin, grass-like structures. Seedlings develop shallow root systems and 2-4 true leaves within 7-14 days.
Ensure adequate soil moisture and good seed-to-soil contact. Avoid heavy rolling or traffic. Protect from competition or shade during first 3-4 weeks.
Vegetative Establishment
4-8 weeksPlants develop 4-8 leaves and begin tillering (producing side shoots). Orchardgrass and timothy produce dense leaf clusters; bromegrass grows more upright. Root systems deepen and expand.
Begin light grazing or mowing only after plants reach 6+ inches if necessary, but avoid stress during first season. Fertilize with moderate nitrogen (N) if soil tests low.
Vegetative Growth & Tiller Development
6-12 weeksDense tiller formation creates thick stand. Shoots elongate but do not yet boot (form seed heads). Leaf growth dominates; nutritional quality is high. Plants exhibit species-specific growth patterns: orchardgrass and timothy slower in cool spring, bromegrass more aggressive.
Apply split nitrogen applications (spring and post-first-cut) for sustained growth. Monitor stand density and cover; thin stands may need reseeding or overseeding. Regular 4-6 week cutting cycles maintain vegetative state.
Boot to Heading (Reproductive)
2-3 weeksSeed heads begin to form in the boot stage, then emerge at heading. Fiber content and lignin increase; digestibility declines. Species progress at different times (timothy typically first, orchardgrass mid-season, bromegrass later).
First and most nutritious hay harvest occurs at early-boot to early-heading stage. Cut before seed heads fully emerge for optimal quality. Delaying harvest reduces forage digestibility but increases yield.
Seed Development & Maturity
3-4 weeksSeed heads fully mature; plants enter seed-set phase. Leaf senescence (yellowing) begins. If left uncut, seeds ripen and drop, allowing natural reseeding.
If harvesting at this stage, quality is reduced but yield is maximized. Allow one final cutting per year to mature for seed production and stand vigor in subsequent years. Remove fallen seed heads if quality forage is priority.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Monitor for leaf damage; control if >30% defoliation. Mow early in day when worms are exposed; insecticides if thresholds exceeded. Parasitoid wasps and natural predators provide biological control.
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Rare in hay stands, more common in pastures. Maintain vigor with proper fertilization and moisture to reduce stress. Insecticide application if severe infestations develop.
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and
(Noctuidae family)
Scout at boot stage. Mow or cut hay at optimal stage to reduce pest habitat. Parasitoid wasps and natural enemies often control populations.
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Severe in drought years. Maintain adequate moisture; avoid bare patches that favor egg-laying. Mow to reduce cover; insecticides only if economic thresholds (>10 per sq. yard) met.
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Produces sclerotia (ergot bodies) in seed heads; toxic to livestock. Remove ergot bodies during harvest or prevent by harvesting before seed maturity. Avoid overfeeding ergot-contaminated hay to pregnant animals.
Uses
Livestock Forage & Hay Production
CulinaryMixed grass hay is the primary forage for horses, cattle, sheep, and goats. Early-cut timothy and orchardgrass provide high-quality roughage with balanced fiber and digestibility. [source]
Pasture Nutrition
CulinaryThese grasses provide nutritious grazing throughout the growing season. Different species peak at different times, extending the productive grazing window. [source]
Soil Conservation & Erosion Control
HouseholdDeep, fibrous root systems stabilize soil and reduce erosion on slopes or along waterways. Perennial stand minimizes bare ground. [source]
Wildlife Habitat & Nesting Cover
WildlifeDense grass stands provide nesting cover and forage for game birds (pheasants, quail), waterfowl, and small mammals. Seed production supports birds and wildlife. [source]
Soil Health & Organic Matter
HouseholdPerennial grass root decay builds soil organic matter and improves structure. Nitrogen fixation is enhanced when legumes are intercropped. [source]
Harvest Tips
First cutting: Harvest at early-boot stage (when seed heads just emerging) for optimal quality and nutritional value (~16-18% crude protein). Early-boot timing balances digestibility and yield. Subsequent cuttings: Cut every 4-6 weeks during growing season for vegetative regrowth. Final cutting: Time last harvest 6 weeks before first frost to allow winter hardening and stand recovery. Dry to 15-20% moisture before baling to prevent mold. Rake and cure properly (1-2 days in good weather). Orchardgrass heads are coarser and more selective by animals; timothy is finer and more palatable; bromegrass provides intermediate texture and seasonal production.
Fun Facts
- 🌱 Timothy grass was named after Timothy Hanson, an 18th-century colonial farmer who popularized the grass in American agriculture; it is native to temperate Europe and Asia.
- 🌱 Orchardgrass is highly palatable and nutritious, but its tall, coarse seed heads are less appealing to livestock—early-boot cutting preserves quality by removing seed head fiber before it matures.
- 🌱 A single mature bromegrass or timothy plant can produce over 10,000 seeds, allowing natural reseeding and stand persistence for 5-10 years or more with proper management.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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