What time of year is best to apply K?
There is not really a best time of the year to apply K. The goal of fertilization is to ensure that adequate K is available within the soil to supply plant nutrient demand, so timing is not especially critical. There are, however, a few exceptions to this general rule. Ideally, coarse textured, sandy soils that are subject to leaching and high rainfall should have K applications postponed until close to planting and establishment. Crops that have high K demand during certain development periods, such as cotton during boll fill, can also benefit from delayed timing closer to peak demand.
