Growing season
/ˈɡroʊɪŋ ˈsizən/
Definition
Growing season refers to the part of the year when environmental conditions let plants actively grow. It usually means temperatures are warm enough, daylight is sufficient, and water is available for new leaves, stems, roots, flowers, or fruit to develop. In gardening and agriculture, it is distinct from the frost-free period because some plants begin or continue growth outside strictly frost-free dates.
Practical Relevance
- Timing of active growth: During the growing season, plants put more energy into new leaves, roots, stems, flowers, and fruit, so water and nutrient demand usually rises.
- Limits set by climate: Length and timing depend mainly on temperature, light, and frost patterns. In mild regions it can be long, while in cold climates it may be short and sharply bounded.
- Planning sowing and harvest: Gardeners use the growing season to match crops and ornamentals to local conditions, especially for seed starting, transplanting, flowering, fruit ripening, and harvest timing.
- Dormancy and rest periods: Outside the growing season, many plants slow down or enter dormancy, a resting state with reduced growth. This shift affects pruning, feeding, and watering decisions.
Related Terms
Frost date
Frost date refers to the average calendar date of the last spring frost or the first fall frost at a specific location…
Last frost
Last frost refers to the final spring date on which freezing temperatures, usually 32°F or lower, are expected in a…
First frost
First frost refers to the first occurrence in a season when air at ground level drops to 32°F or below long enough for…
Hardiness zone
Hardiness zone refers to a geographic rating system used in gardening to describe the average annual extreme minimum…
Growing degree days (GDD)
Growing degree days (gdd) are a heat-based biological concept used to estimate plant and insect development over a…
Photoperiod
Photoperiod refers to the length of light and darkness a plant receives in each 24-hour cycle. It is a biological…
Vernalization
Vernalization is a plant physiological process in which exposure to a period of low temperatures triggers or speeds the…

