Variety traits

Cotton growing season

Gossypium hirsutum L.

The time interval from seedling emergence to seed maturation or the opening of the first bolls, ranging from 110 to 150 days in Gossypium hirsutum L.

In the reference 13 varieties crop Upland cotton, where this is mentioned in the description.

For cotton, the growing season is calculated from the moment of full seedling emergence to the onset of biological seed maturity or the beginning of boll opening. The duration of this interval in cultivated forms varies from 110 to 150 days, with varieties having a period of 104–120 days considered early-maturing, and those exceeding 130–140 days considered late-maturing.

The selection of a variety based on the duration of the growing season is determined by the sum of active temperatures, which is about 3000°C for early-maturing forms and up to 4000°C for late-maturing ones. The length of the period is significantly influenced by external factors: excessive moisture, high rates of nitrogen fertilizers, and plant population density can prolong the growing season, increasing vegetative growth at the expense of boll ripening.

General information about the subject — on the page Vegetation period.

Sources8

Varieties of Upland cotton mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.