Children’s home learning environments were examined in a low-income sample of 1,852 children and families when children were 15, 25, 37, and 63 months. During home visits, children’s participation in literacy activities, the quality of mothers’ engagements with their children, and the availability of learning materials were assessed, yielding a total learning environment score at each age. At 63 months, children’s vocabulary and literacy skills were assessed. Six learning environment trajectories were identified, including environments that were consistently low, environments that were consistently high, and environments characterized by varying patterns of change. The skills of children at the extremes of learning environment trajectories differed by more than 1 SD and the timing of learning experiences related to specific emerging skills.