Cotton had been planted successfully in late winter – early spring before the appearance of the Silverleaf Whitefly. Since 1994, this pest has caused a severe impact in agricultural practices in Northwestern México. Planting dates were the most affected. A new planting date in late fall (December) is being proposed to escape the impact of the Silverleaf Whitefly. December planting date has similar yield potential as the former optimum planting date and also the advantages of avoiding the effect of high temperatures during the critical phase of the fruiting period, and is possible to evade the monsoon rains that cause boll rot and yield losses in rainy years.