When does the flower fall off and the cotton actually pop out? Add a generous amount of compost to the first several … Summer, Fall, Winter, Spring? It’s not every year that this flower blooms, but when it does, it really puts on a show. This Site Might Help You. Cotton can handle sandy, loamy, and clay types equally well. RE: What season/time of year does cotton bloom? Arizona ranked 3rd among the four Pima cotton producing states … Barbara Karst, shown below, is the best bougainvillea variety for Phoenix because it blooms all year and takes the heat better than other varieties. Its blossoms range from purple to violet to pink depending on weather conditions. The trees need time to become established before they will bloom every year. Cotton plants bloom when they mature, just as other plants and flowers do, usually in early fall. Cotton germinates best in temperatures between 75-80°F. The seeds take about two weeks to germinate, so don’t get impatient. A dogwood tree can bloom during their second year. It looks like white cotton candy. Since hand labor is no longer used in the U.S. to harvest cotton, the crop is harvested by machines, either a picker or a stripper. Cotton picking machines have spindles that pick (twist) the seed cotton from the burrs that are attached to plants’ stems. Forming as a small yellow cup made of four petals, this flower is simple yet elegant. As we follow the basic stages in the development of the cotton crop, we commonly look for points relative to the fruiting or flowering cycle . For example, early bloom, peak bloom, and cut-out are major stages in cotton crop development. Perhaps the most famous of the Sonoran Desert wildflowers, it can blanket entire hillsides during banner years. Crop Profile for Cotton in Arizona Prepared: August, 1999 General Production Information Among the cotton producing states, in 1998, Arizona ranked 8th in cotton lint and cottonseed production. Plants prefer a pH between 5.5-8.5, and well-drained, rich earth. Cotton's history in Arizona began with Tempe man Special for The Republic | azcentral.com Published 3:06 p.m. MT July 18, 2014 | Updated 10:47 a.m. MT July 21, 2014 The official Arizona state seal. Soil Requirements. Cotton prefers loose earth, but many varieties will grow in compact, drier soil. Some dogwoods take between five and seven years to bloom fully.