<p>Given the importance of personal growth in many aspects of satisfying relationships, growth motivation may be especially desirable in prospective mates. Such growth motivation could implicate individuals as capable of satisfying reproductive motives, particularly in long-term mating contexts, based on its potential to foster flourishing and connotation of psychological maturity. This study considered how humanistic (versus egoistic) growth motivation heightens the desirability of prospective mates. Participants evaluated hypothetical opposite-sex mates in long-term and short-term contexts described as exhibiting high and low levels of growth motivation in experiential <i>and</i> reflective domains while similarly estimating the targets’ proclivity toward infidelity. Women found high growth motivation desirable in men, particularly in long-term mating. Low growth motivation connoted greater proclivity toward infidelity. Results indicate a functional basis for preferences for growth motivation, potentially rooted in an awareness of the reproductive costs such an orientation could offset for women. Findings integrate evolutionary and humanistic perspectives.</p>