Some of Arizona's cotton acreage is double cropped after small grain, particularly when lint prices are high. In limited field testing we have had inconsistent cultivar yield response to late planting. To resolve these inconsistencies, we established cultivar by planting date tests at Maricopa (1200' elevation), Marana (2000' elevation), and Safford (2900' elevation), in 1985. There were five planting dates from about April 1st to about June 10th at each location. There were 12 upland cotton cultivars at Maricopa an Marana, and eight upland and two pima cotton cultivar at Safford. He speculated that inconsistent cultivar yield response in the past may have been due to cultivar by date of planting interaction for nodes to first boll or internode length. Therefore, we sampled five plants per plot in three reps per treatment after bolls were set (2550 plants), counted nodes to the first boll, and made two measurements to evaluate internode length.