Frost-free period
The interval between the last spring frost and the first autumn frost, during which the air temperature remains above zero degrees Celsius.
Также говорят: growing season, frost-free days
The frost-free period is a fundamental factor in agricultural planning, determining which crops can reach maturity in a specific climate zone. It directly influences the selection of seeds and the scheduling of field operations to protect sensitive plants from cold stress.
Farmers should rely on localized meteorological data rather than general regional statistics. A common mistake is neglecting the microclimate of individual fields; for instance, valleys often experience frost earlier than higher ground, which can shorten the growing window significantly.
To mitigate the risks associated with shorter seasons, growers often utilize row covers, high tunnels, or cold-hardy cultivars. Effective management of this period ensures that warm-season crops have sufficient thermal accumulation to produce a successful harvest before the onset of winter.