Alfalfa Planting Calendar: Establishment and Cutting

Alfalfa is a perennial that can last for years, so the way you establish it shapes the stand for a long time. Seeding date, seedbed and the first cutting all matter.

Key points

Alfalfa is usually seeded in early spring or late summer, and extension sets the local window.
NASS lists harvest dates but not seeding dates for alfalfa hay.
Soil test, pH and a firm seedbed make or break the stand.
Avoid cutting too late in fall and give regrowth time.

When should you seed alfalfa?

Most extension programs describe two main seeding windows: early spring and late summer. Spring seeding takes advantage of moisture and lets the stand begin producing in its first year, but weeds compete hard. Late summer seeding gives less weed pressure, yet the seedlings need enough time to establish before winter. Which one works depends on your region, so ask your state forage specialist for the date range that applies.

USDA NASS does not publish usual seeding dates for alfalfa hay. Its table lists only harvest dates, so for seeding you need your state extension guide. A typical guide will set a latest safe date for late summer seeding based on the first fall frost, and it will note that the seedlings need several weeks of growth before hard freezes.

What does alfalfa need in the seedbed?

Alfalfa is sensitive to soil acidity and poor drainage. A soil test tells you about pH and nutrient levels, and extension recommendations help you decide on lime and fertilizer. Apply them according to the test and local rules, because nutrient management requirements vary by state. Do not guess, and do not skip the lime step if the test calls for it, since lime takes time to work.

Alfalfa seed is small, so a firm seedbed and shallow seed placement are important. Many failures come from seeding too deep or into a loose seedbed. Ask your local specialist about seed treatments, inoculant and varieties with traits that fit the problems you have, such as a specific disease.

Soil test first, lime if recommended
Plant shallow into a firm seedbed
Avoid poorly drained fields

When is the usual first cutting?

NASS lists the usual start of alfalfa harvest in the October 2010 edition as about May 24 in Iowa, May 20 in Wisconsin, May 25 in Minnesota and May 10 in Kansas, with harvest ending at the stated end dates for each state, such as about September 29 in Iowa and October 10 in Wisconsin. Southern and western states start earlier and run longer.

These dates describe when harvest typically begins in those states, not when you should cut. Cut timing depends on plant stage, weather and your feed quality goals, and extension forage specialists teach how to judge stage in the field.

How does cutting schedule affect stand life?

Alfalfa stores energy in its roots, and cutting too often or too late in the fall can weaken the stand. Extension programs usually recommend leaving enough time between cuttings for regrowth and avoiding a cut in the period before frost when plants need to build reserves. The specific timing differs by region, so ask your forage specialist for the schedule that fits your area.

A year-one stand is more fragile than an established one. Ask extension how to handle the first harvest after seeding.

What problems should you watch for?

Common problems include weed competition in spring seedings, insect pests, diseases that thin stands and winter injury. Extension programs publish scouting guides and thresholds. Any pesticide use follows the label, including pre-harvest intervals and bee protection rules, since alfalfa blooms attract pollinators. Applicator licensing varies by state.

Stand age matters too. Once a stand thins past a point, ask extension whether to overseed, rotate or replace it. Autotoxicity can make reseeding alfalfa right after alfalfa difficult, so extension programs often recommend waiting or rotating.

How do you plan your first season?

Write a timeline: soil test and lime, seedbed prep, seeding date, weed control, first cut and last fall cut. Add notes on weather and results. If you are new to alfalfa, ask a neighbor who has a good stand what they would do differently.

Alfalfa fits well with livestock operations, but markets for hay can be local. Check your market before you seed more acres than you can sell or feed.

Write a seeding to fall-cut timeline
Talk to a neighbor with a good stand
Confirm hay markets

What does a worked cutting plan look like?

Suppose your usual first cutting happens in late May, and you plan for several cuttings before fall. You would mark the calendar for the last cut early enough that plants have time to regrow and build root reserves before frost, using your own first fall frost date and your extension guide. You would also watch the weather, since a long wet spell can push every cutting later than planned.

Timing at a glance

Timing ranges for this topic
Item	Window	Caveat
Alfalfa hay harvest start, Iowa	Usual harvest begins about May 24 and ends about September 29	Usual dates describe typical field activity in that state, not a safe date for your farm. Check your own last frost date, soil temperature and your state extension guide.
Alfalfa hay harvest start, Wisconsin	Usual harvest begins about May 20 and ends about October 10	Usual dates describe typical field activity in that state, not a safe date for your farm. Check your own last frost date, soil temperature and your state extension guide.
Alfalfa hay harvest start, Minnesota	Usual harvest begins about May 25 and ends about September 24	Usual dates describe typical field activity in that state, not a safe date for your farm. Check your own last frost date, soil temperature and your state extension guide.
Alfalfa hay harvest start, Kansas	Usual harvest begins about May 10 and ends about November 1	Usual dates describe typical field activity in that state, not a safe date for your farm. Check your own last frost date, soil temperature and your state extension guide.

When to get local help: Ask your county extension office or state forage specialist about seeding dates, varieties and cutting schedules.

Sources and further reading

Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.

More in Field Crops, Grains & Oilseeds

← Chickpea Planting Calendar Hay Planting Calendar by Region →