Alfalfa

Sub-Canopy

Alfalfa

Medicago sativa

Also known as: Lucerne

Sub-CanopyShrub Fabaceae EdibleNitrogen FixerAnimal FodderSoil ImprovementErosion ControlPollinator
Hardiness Zone
3-10
Ideal Temp
65°F (18°C)–85°F (29°C)°F
Survives Down To
-15°F (-26°C)°F
Life Cycle
Perennial

Alfalfa, also known as lucerne, is a perennial flowering plant in the legume family. It typically grows up to 1 meter (3.3 feet) in height and has a deep root system that can extend more than 15 meters (49 feet) to access groundwater. The plant has trifoliate leaves with obovate leaflets and clusters of small purple flowers. It is highly valued for its nutritional content and is widely cultivated as forage for livestock. Alfalfa thrives in well-drained soils with a neutral pH and requires full sun for optimal growth. It is drought-tolerant due to its extensive root system and can improve soil fertility through nitrogen fixation. ✂️🫘 **Methods to Propagate:** Alfalfa is commonly propagated through seeds. The seeds should be inoculated with Rhizobium bacteria to ensure effective nitrogen fixation. Sowing is typically done in the spring or fall, depending on the climate, at a depth of about 1 centimeter (0.4 inches). A firm seedbed and adequate soil moisture are essential for successful germination. 🌞💧 **Sun and Water Requirements:** Alfalfa requires full sun exposure to thrive. It prefers well-drained soils and is tolerant of drought conditions once established, thanks to its deep root system. However, during establishment, consistent moisture is crucial to ensure proper root development. 🧑‍🌾👩‍🌾 **When to Harvest:** The optimal time to harvest alfalfa is at the early bloom stage, which balances yield and nutritional quality. Multiple cuttings can be made throughout the growing season, typically every 28 to 35 days, depending on growth conditions.

Good Neighbors
  • Corn
  • Oats
  • Barley
Cautions
  • Onion
  • Garlic
Known Threats — Organic Solutions Only
Aphids
Aphidoidea
Banded Cucumber Beetle
Diabrotica balteata
Bean Aphid
Aphis fabae
Bean Leaf Beetle
Cerotoma trifurcata
Bean Weevil
Acanthoscelides obtectus
Brown Marmorated Stink Bug
Halyomorpha halys
Clover Weevils
Sitona lepidus
Corn Earworm
Helicoverpa zea
Cowpea Curculio
Chalcodermus aeneus
Fall Armyworm
Spodoptera frugiperda
Fusarium Wilt
Fusarium oxysporum
Ganoderma Butt Rot
Ganoderma spp.
Harlequin Ladybird
Harmonia axyridis
Kudzu Bug
Megacopta cribraria
Locust Borer
Megacyllene robiniae
Locust Leaf Miner
Odontota dorsalis
Lubber Grasshopper
Romalea microptera
Pea Moth
Cydia nigricana
Pea Weevil
Bruchus pisorum
Pythium Root Rot
Pythium spp.
Reniform Nematode
Rotylenchulus reniformis
Root Aphid
Pemphigus spp.
Soybean Looper
Chrysodeixis includens
Spittlebugs
Cercopidae
Spotted Cucumber Beetle
Diabrotica undecimpunctata howardi
Stink Bug
Pentatomidae
Striped Cucumber Beetle
Acalymma vittatum
Velvetbean Caterpillar
Anticarsia gemmatalis
White Rot
Sclerotinia sclerotiorum