Abstarct: Seed aging and decreasing in seed quality is a prevalent event in cotton as the other oiled-seed crops. The rate of seed aging depends on genetic structure, seed producing environment and storage condition. Since the cotton seeds are keeping in different conditions and seeds with different qualities are available for the farmers, a basic understanding of the possible reactions of aged seeds to the planting date and plant density in Golestan province is an important issue. An experiment was conducted at Institution of Iran's Cotton Research Center in Karkande Station located in Gorgan as a split split plot baxsed on completely randomized blocks in 4 replications. The main plots contained 3 planting dates: Ordibehesht 18th (p1), Khordad 3rd (p2) and Khordad 27th (p3). The sub plots included seed quality in 3 levels: control (a1), 3-days aging (a2) and 4-days aging (a3) in 42 centigrade degrees and 100 percents humidity. Split split plots contained 60 centimeters (d1), 70 centimeters (d2) and 80 centimeters (d3) as row distances. According to the distance between the rows, area of plots were 21/6, 25/2 and 28/8 m2. Increasing the rate of seed aging caused the number of reproductive branches, length of vegetative branches, stem diameter, stem and leaf dry weight to increase. Accelerate aging did not affect the other morphological traits such as the number of vegetative branches, length of reproductive branches, number of stem nodes and plant height. Through the yield components number of boll in plant and number of unopened boll in plant increased by seed aging. Accelerate aging did not have significant effect on boll weight and 100-seeds weight. The yield rate in 3 and 4-days aging was respectively 15/28% and 22/61% lower compare to the control treatment. Results indicated that through the morphological traits, delayed planting date caused the length and number of reproductive branches, number of stem nodes, stem diameter, height, leaf and stem dry weight to increase. But it did not have significant effect on number of vegetative branches. Delaying in planting date increased the boll weight, 100-seeds weight and number of unopened boll. in plant. The yield rate in 3rd and 27th of Khordad planting dates was respectively 21/7% and 80/3% lower than 18th of Ordibehesht. The number of unopened boll caused the yield to collapse by delaying in planting date. Length and fiber uniformity decreased and fiber strength increased. On the other uniformity and fiber elegance did not affected. By Increasing the row distance from 60 centimeters to 80 centimeters, number of reproductive branches, length of vegetative and reproductive branches, number of stem nodes, leaf and stem dry weight and number of boll in plant increased. Maximum and minimum boll seed obtained respectively from 70 centimeters and 60 centimeters row distance. Row distance had no significant effect on the other yield components. Delaying in planting date caused the yield to decreased so that in 80 centimeters row distance was respectively 9/75% and 9/44% lower than 60 and 70 centimeters row distances. fiber quality parameters did not affect by plant density.