Alfalfa will quit growing after the first hard freeze (when temperatures reach below 26°F), which in Kansas occurs on average around Oct. 15, but can be as early as Oct. 1 or late as Nov. 1. The decision should be weather-based at this time of the year because the timing of the last two cuttings impacts the winter survival and productivity of the stand in the following year.
Alfalfa cutting time table in Kansas outlined