How to Grow Alfalfa Vernal DK 145

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Alfalfa Vernal DK 145

Medicago sativa L. 'Vernal DK 145'

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Alfalfa Vernal DK 145 is a cold-hardy perennial legume forage crop bred for northern climates, known for its winter dormancy and excellent persistence. This cultivar is specifically developed for dairy and livestock feed, offering high nutritional value and disease resistance. It establishes quickly and produces multiple cuttings per season in suitable climates.

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Example Alfalfa Vernal DK 145 timeline · Pittsburgh, PA (Zone 6b)

Plant Alfalfa Vernal DK 145
Around Apr 17

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

Watering, feeding, and pest-watch reminders.
Harvest Alfalfa Vernal DK 145
Late summer into fall

Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Alfalfa Vernal DK 145 dates for your own zip code.

Growing Conditions

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Sun: Full sun, minimum 6 hours daily (8+ hours optimal)

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Water: Moderate water needs; drought-tolerant once established. Requires 15-20 inches of annual precipitation or supplemental irrigation. Deep watering encourages long taproot development. Reduce watering frequency in winter dormancy.

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Spacing: 6-12 inches between plants in rows 24-36 inches apart (typically seeded densely at 15-20 lb/acre) inches

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Days to maturity: 80-100 days to first cutting; full productivity in year 2

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Planting depth: 0.25-0.5 inches

Soil

Type: Well-draining loamy soil with good calcium content

pH: 6.5-7.5

Amendments:

Lime (to raise pH if acidic) Phosphorus Potassium Boron (trace amounts) Molybdenum (trace amounts)

Growing Zones

Find your zone →

Thrives in zones 2-7, with exceptional cold hardiness for northern climates

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

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Growth Stages

Germination & Emergence

10-14 days

Seeds sprout and develop cotyledons; small seedlings with first true leaves emerging

Keep seedbed consistently moist but not waterlogged. Provide full sun. Protect from heavy foot traffic and grazing.

Seedling & Establishment

4-8 weeks

Rapid leaf development; deep taproot establishing; plant reaches 4-8 inches in height

Maintain steady moisture during establishment. Avoid grazing or cutting during first 6-8 weeks to allow root development. Control competing weeds.

Vegetative Growth

6-10 weeks per cutting cycle

Plant develops multiple stems and leafy growth; reaches 12-24 inches before flowering

Monitor for pests and disease. Ensure adequate drainage. This cultivar exhibits winter dormancy; growth slows as temperatures drop in fall.

Flowering & Early Bloom

1-2 weeks

Purple flowers appear at stem tips; plant reaches 24-36 inches; optimal forage quality period

Harvest at early bloom stage for maximum nutritional value and digestibility. Delay harvest beyond mid-bloom reduces quality significantly.

Dormancy & Winter Rest

4-6 months (November-March in northern zones)

After final fall cut, plant enters dormancy; growth halts completely; cold hardiness trait activates

Final cutting should occur 4-6 weeks before first hard freeze to allow carbohydrate accumulation for winter survival. Reduce irrigation. Do not graze or cut during dormancy.

Companion Planting

Plan your garden →

Plant with:

Orchardgrass Timothy grass Bromegrass Birdsfoot trefoil Clover

Avoid planting near:

Wheat Corn Legume crops with similar pest profiles Poorly drained fields

Common Pests

Monitor larvae in spring; harvest at late bud stage; use biological control predators; insecticidal sprays if populations exceed 3-5 larvae per stem
Generally non-damaging; maintain plant vigor; early cutting disrupts lifecycle
Monitor leaf undersides; harvest frequently to reduce populations; reflective mulch as deterrent
Early detection; harvest immediately if damage observed; insecticidal soap for severe infestations

Uses

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Livestock Forage & Animal Feed

Culinary

Alfalfa Vernal DK 145 is a premium forage crop for dairy cattle, beef cattle, horses, and small ruminants. Its high protein content (15-22%), balanced minerals, and digestible fiber make it ideal for maintaining animal health and milk production. [source]

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Hay Production & Storage

Household

The cultivar's winter dormancy and cold hardiness make it excellent for northern hay operations. Produces dense, high-quality hay bales suitable for long-term storage and winter feeding. [source]

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Nutritional Supplement & Herb

Medicinal

Alfalfa contains vitamins K, A, C, and minerals including calcium, iron, and magnesium. Traditionally used as a nutritional tonic and in herbal preparations for livestock and human consumption. [source]

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Soil Improvement & Nitrogen Fixation

Household

As a nitrogen-fixing legume, alfalfa enriches soil with 100-200 lbs/acre of fixed nitrogen annually. Improves soil structure and organic matter when incorporated. [source]

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Pollinator & Wildlife Habitat

Wildlife

Alfalfa flowers attract bees, butterflies, and other pollinators. Provides beneficial insect habitat and food sources throughout the growing season. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest at early to mid-bloom stage (typically 50% flowering) for optimal forage quality. Vernal DK 145 typically produces 2-4 cuttings per season depending on zone; northern zones yield 2-3 cuttings. Cut to 2-3 inch stubble height. Final cutting in northern zones should occur 4-6 weeks before first freeze. Machinery cutting is standard for field-scale production. Moisture at harvest affects preservation; bale at 18-20% moisture for good storage.

Fun Facts

🌱 The name 'Vernal' refers to the spring-like growth pattern and the cultivar's exceptional winter dormancy—a trait that allows it to survive temperatures below -40°F in northern climates.
🌱 Alfalfa has one of the deepest root systems of any crop plant, with taproots reaching 20+ feet deep in favorable soil, allowing it to access water and nutrients unavailable to shallow-rooted crops.
🌱 Alfalfa Vernal DK 145 is a polyploid cultivar (tetraploid) developed specifically for cold hardiness and forage quality, making it fundamentally different from less hardy alfalfa types.

Gardening Terms

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

Annual Cultivar Full Sun Perennial True Leaves

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