Frost-Free Period

Frost-Free Period

 

a part of the year when the temperature stays continuously above 0° C in an average calculation over several years. This period lasts from the long-term average date of the last spring frost to the long-term average date of the first autumn frost. In the northern regions of the USSR the frost-free period is less than 150 days. (On the Iamal and Taimyr peninsulas it is about 45 days.) In the west and south of the country it is 250 days and longer. (In the region of Batumi and on the southern coast of the Crimea it lasts 300 days and longer.) In the temperate zones it corresponds approximately to the growing season, whose duration significantly determines the composition of the local wild and cultivated vegetation.

References in periodicals archive ?
Dandelion roots can be harvested during any frost-free period of the year and eaten raw, steamed, or even dried, roasted and ground into a coffee substitute.
Accordingly, the frost-free period fluctuates from 125 to 175 days.
A number of negative correlations are related to the decrease in temperature in the direction to the north: MTWM, sums of active temperatures (SAT), duration of the frost-free period (FFP), and CCI, etc.
Altogether, 10 climatic parameters were analysed; among them no correlations were found of the distribution of the Tilia taxa with the average temperature in July (MTWM), the duration of the frost-free period (FFP), and the mean annual sunshine duration (MASD).
PREPARE the ground for new trees and shrubs in a frost-free period.
The longer-range forecast from the London Weather Centre is also for a mild, frost-free period with the odd shower.
Much more important is pruning at the right ti Small branches up to one inch in diameter, or 5pc the total crown, whichever is less, and dead wood any size can be removed at any time of the year with problems although the pruning of box hedges must confined to frost-free periods because of the risk frost damage to the freshly-cut surfaces.