How to Grow Alfalfa (Dormant Varieties) Northstar
Wikimedia Commons
Alfalfa (Dormant Varieties) Northstar
Medicago sativa subsp. sativa
herbNorthstar is a dormant alfalfa variety bred for cold-hardy performance in northern climates, offering superior winter survival and regrowth vigor. This perennial legume is primarily grown as a forage crop for livestock feed, though it also serves as a nitrogen-fixing cover crop. The variety combines exceptional cold tolerance with strong productivity, making it ideal for regions with harsh winters.
When should you plant Alfalfa (Dormant Varieties) Northstar in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Alfalfa (Dormant Varieties) Northstar timeline · Pittsburgh, PA (Zone 6b)
-
Plant Alfalfa (Dormant Varieties) Northstar
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Alfalfa (Dormant Varieties) Northstar
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Alfalfa (Dormant Varieties) Northstar dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 2-6; Northstar excels in cold climates where non-dormant varieties would fail
Sign up free to see if Alfalfa (Dormant Varieties) Northstar grows in your zone — and get a personalized planting timeline.
Get my Alfalfa (Dormant Varieties) Northstar timeline →Growth Stages
Seedling
3-4 weeksTiny cotyledons emerge with true leaves following. Plant is fragile and vulnerable to competition.
Keep soil consistently moist but not waterlogged. Weed early and aggressively. Avoid grazing or cutting during this stage.
Vegetative Establishment
4-6 weeksPlant develops compound trifoliate leaves and strengthens root system. Rosette stage with increasing leaf canopy.
Continue weed management. Allow plants to develop robust taproots before first cut. Monitor for seedling diseases.
Bud Stage
2-3 weeksFlower buds form along the stem; plant reaches 6-12 inches in height, indicating readiness for first harvest.
Harvest at late bud to early bloom stage for optimal quality. Delay cutting until adequate root reserves develop.
Flowering & Regrowth
Continuous throughout growing season (3-4 cycles)Purple flowers bloom; plants are cut for forage. Dormancy is triggered by decreasing day length in fall, hardening plants for winter.
Subsequent cuts follow similar patterns. Make final fall cut 4-6 weeks before first hard frost to allow regrowth and dormancy establishment. Remove at least 2-3 inches of stubble.
Dormancy & Winter
4-6 monthsPlants enter complete dormancy in fall; foliage dies back as stored energy moves to roots and crown. Northstar's genetics enable survival of extreme cold.
No management needed. Do not graze or cut after dormancy is triggered. Snow cover protects plants. Spring green-up begins when soil warms.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Scout in early spring; cut at early bud stage to remove larvae; parasitic wasp (Bathyplecis curculionis) provides biological control; insecticides if threshold exceeded
-
Plant tolerant varieties; encourage natural predators (ladybugs, lacewings); cutting stimulates regrowth that outpaces aphid damage
-
Early cutting disrupts life cycle; maintain plant vigor; insecticides for severe infestations
-
Rotate crops; select nematode-resistant varieties when available; avoid replanting infested fields immediately
-
Border crops to reduce migration; early cutting before pod formation; insecticides if economic threshold reached
Uses
Livestock Forage & Feed
CulinaryAlfalfa is a premium forage crop for cattle, sheep, goats, and horses, providing high protein (15-25%) and essential nutrients. Northstar's cold hardiness makes it reliable for northern dairy and beef operations. [source]
Human Nutritional Supplement
MedicinalAlfalfa sprouts and leaf powder are consumed as nutritional supplements rich in vitamins (K, A, D, B), minerals, and chlorophyll. Traditionally used for arthritis, kidney health, and appetite stimulation. [source]
Nitrogen Fixation & Soil Amendment
HouseholdAs a nitrogen-fixing legume, alfalfa stores atmospheric nitrogen through Rhizobium bacteria, enriching soil for subsequent crops and reducing synthetic fertilizer needs. Excellent cover crop and rotational plant. [source]
Pollinator & Wildlife Support
WildlifeAlfalfa flowers attract bees, butterflies, and beneficial insects. Fields provide habitat for grassland birds and small mammals, supporting biodiversity on farms. [source]
Hay & Bedding Production
CraftHigh-quality alfalfa hay is baled and stored for winter livestock feeding and is preferred for horse bedding due to palatability and softness. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
First-year establishment: harvest at late bud to early bloom stage (typically 6-8 weeks after planting) to prevent yield loss in subsequent years. Subsequent years: harvest at early bloom stage (10-20% flowers open) for optimal forage quality and palatability. Make 3-4 cuts per season in northern zones, timing final fall cut 4-6 weeks before first frost. Cut 2-3 inches above soil surface to preserve crown and emerging shoots. Allow 3-4 weeks regrowth between cuts. Northstar typically produces 3-4 tons dry matter per acre annually depending on management and rainfall.
Fun Facts
- 🌱 Alfalfa's name derives from Arabic 'al-fal-fah' meaning 'father of all foods,' reflecting its reputation as one of the most nutritious forage crops globally.
- 🌱 Northstar and other dormant varieties survive extreme cold (down to -40°F/-40°C) by entering a genetically programmed winter dormancy that suspends growth and metabolic activity, whereas non-dormant varieties are killed by freezing.
- 🌱 A single alfalfa plant can produce a taproot extending 15+ feet deep, allowing it to access water unavailable to shallow-rooted plants, making it exceptionally drought-tolerant once established.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Alfalfa (Dormant Varieties) Northstar planting timeline
Tell us your zip code and we'll calculate exactly when to start Alfalfa (Dormant Varieties) Northstar seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Alfalfa (Dormant Varieties) Northstar timeline →