growing season

(redirected from First frost)
Also found in: Dictionary, Thesaurus.

growing season,

period during which plant growth takes place. In temperate climates the growing season is limited by seasonal changes in temperature and is defined as the period between the last killing frost of spring and the first killing frost of autumn, at which time annual plants die and biennials and perennials cease active growth and become dormant for the cold winter months. In tropical climates, in which there is less seasonal temperature change, the amount of available moisture often determines the periods of plant growth; in the rainy season growth is luxuriant and in the dry season many plants become dormant. In desert areas, growth is almost wholly dependent on moisture. In the Arctic the growing season is short but concentrated; the number of daylight hours is so large that the total amount of sunlight equals that of a temperate growing season with shorter days. The length of the growing season often determines which crops can be grown in a region; some require long growing seasons and others mature rapidly. Plants that are perennials in a warm climate may sometimes be grown as annuals in cooler areas; by crossing hardy plant species with less hardy but more productive types, plant breeders have developed desirable new strains that mature in a shorter period. Combinations of factors affect the growing season; in the sheltered valleys and coastal slopes of the Pacific Northwest of the United States, the heavy winter rainfall and the dry summers have produced a Mediterranean type of climate where plant growth occurs during the winter and dormancy during the summer. See climateclimate,
average condition of the atmosphere near the earth's surface over a long period of time, taking into account temperature, precipitation (see rain), humidity, wind, barometric pressure, and other phenomena.
..... Click the link for more information.
; seasonsseasons,
divisions of the year characterized by variations in the relative lengths of day and night and in the amount of heat received from the sun. These variations depend on the inclination of the equator to the plane of the ecliptic and on the revolution of the earth around
..... Click the link for more information.
.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Growing Season

 

or vegetative period.

(1) The time of year in which, according to meteorological conditions, growth and development (vegetation) of plants is possible. In temperate climates, the growing season corresponds approximately to the time interval from the last spring frosts to the first autumn frosts (the frost-free period); in tropical and sometimes in subtropical climates, the growing season lasts the year round. Duration of the growing season in considerable measure determines the composition of local wild and cultivated vegetation.

(2) The time necessary for a plant to go through a complete cycle of development; in agricultural practice, the period from the beginning of growth to the gathering of the harvest. In the same agricultural crop, varieties may be distinguished with short growing seasons—that is, early ripening—and with long ones—late ripening. The former are cultivated in more northerly regions with short frost-free periods or in arid regions, so that they may ripen before drought; the latter are cultivated in more southerly regions. The dependence of the duration of the growing season on conditions of the environment, especially on temperature and light, is quite complex.

The growing seasons of the most important plants under the conditions of central and southern USSR are 270-360 days for winter rye, 200-350 days for winter wheat, 62-189 days for spring wheat, 130-150 days for corn, 101-168 days for sunflowers, 162-264 days for cotton, and 150-210 days for sugar beets. The growing season is determined by the total quantity of heat obtained by the plant in the course of its period of development; the quantity of heat is expressed by a number obtained by multiplying the number of days of the growing season by the average daily temperature.

REFERENCES

Maksimov, N. A. Kratkii kurs fiziologii rastenii, 9th ed. Moscow, 1958.
Chailakhian, M. Kh. Osnovnye zakonomernosti ontogeneza vysshikh rastenii. Moscow, 1958.
Sabinin, D. A. Fiziologiia razvitiia rastenii. Moscow, 1963.
Genkel’, P. A. Fiziologiia rastenii s osnovami mikrobiologii, 3rd ed. Moscow, 1965.

N. A. MAKSIMOV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

growing season

[′grō·iŋ ‚sēz·ən]
(agriculture)
The period of the year when climatic conditions are favorable for plant growth, common to a place or an area.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The first frosts of autumn mean it's time to ensure that your greenhouse is properly clean to keep plants healthy
As the first frosts appear, it's time to get busy in your gardens and prepare for the winter chill Have you had chance to get into your garden this week?
Once the first frost has bashed Canna and Dahlia leaves, dig up the rhizomes, dry off and store in a cool, dry but frost-free spot.
When the first frost arrives, the leaves drop to the ground.
When the first frost comes and half of your garden stays green, you'll have your reward.
BRACE yourselves - the first frost could be landing on Greater Manchester this weekend.
Another option is the 'Indian Summer' variety of Rudbeckia hirta (Black-eyed Susan), which has swarms of jolly golden flowers from now right through to the first frost.
After first frost forecasters say the worst winter in 11 years is on the way What a load of waffle ...
| BRING in tender plants as it is impossible to predict when the first frost will strike.
You can determine the length of your growing season by finding the number of days between the average last frost and average first frost. Use this information to determine whether the seeds you are selecting will grow in your zone, keeping in mind that many yards have small microclimates that will allow you some flexibility in what you can grow.
Make sure tender plants are under cover before the first frost. Fill vacant spots in the veg patch with overwintering onions
"We're very hopeful as it is the first frost of the year," said clerk of the course Anthea Morshead.