Need-supportive coaching has been identified as the most effective way to nurture optimal motivational climates in sport because of its positive influence on athletes’ basic psychological needs of autonomy, competence, and relatedness. However, to date, researchers in sport have not adequately considered whether athletes’ physical, cognitive, social, self, and emotional development prompts any variation in coaches’ delivery of need-supportive behavior. Such insight may reveal a more nuanced approach for coaches to facilitate athletes’ psychological functioning in an age-appropriate way. Therefore, the purpose of this study was to explore athletes’ and coaches’ perceptions of how coaches consider athlete development in the ways in which they seek to fulfill athletes’ basic psychological needs. Figure skating is an ideal sport context for this investigation as coach-athlete relationships typically span many years and developmental milestones. Semi-structured interviews were conducted with 13 coach-athlete dyads (26 interviews) across four age groups: middle childhood (6–10 years), early adolescence (11–14 years), mid-adolescence (15–17 years), and early adulthood (18–25 years). Using reflexive thematic analysis, seven themes were constructed: (a) sport context as a lens for the optimal skill development of athletes, (b) socio-chronological development and relatedness-associated behavior, (c) physical development and relatedness- and competence-associated behavior, (d) skill and ability development and competence-associated behavior, (e) understanding of the sport and autonomy-associated behavior, (f) emotional development and relatedness-behavior, and (g) relational qualities further shape coaches’ need-supportive behaviors.