Planting Date · Alfalfa
Alfalfa Planting Date Calculator
Calculate the optimal planting dates for alfalfa based on your USDA zone, last frost date, and preferred start method.
Optimal Soil Temp
50°F
Days to Maturity
60 days
Frost Tolerance
hardy
Planting Depth
1/4 inch
Input
Fill in the fields below, then click Calculate.
Select your USDA plant hardiness zone (3–10).
Approximate month of your last spring frost.
How you plan to start the crop.
No results yet
Fill in the fields and click Calculate to see results.
Tips & Best Practices
- Spring seeding: plant 4 weeks before the last frost when soil is workable.
- Fall seeding (preferred in many areas): plant 6–8 weeks before the first fall frost.
- Inoculate with proper Rhizobium strain for nitrogen fixation.
- Alfalfa needs well-drained soil with pH 6.5–7.5 — it will not tolerate acidic soils.