This qualitative study examined factors that gifted Finnish upper secondary school physics students (N = 24) identified as helping or hindering their talent development in physics. In-depth interviews captured students' descriptions of critical incidents regarding their physics talent development at home, school, and in leisure time. The results show that most of the critical experiences the students identified were related to fostering talent development. Parental physics-specific support, motivated and gifted peers, digital and traditional physics-related media, certain teacher characteristics, and some instruction- and curriculum-based opportunities were among the factors the students considered supportive. The results also reveal several factors relating to family, school, and leisure time that hinder talent development. Moreover, the analysis highlights the students' low interest in physics competitions. The findings can be used by administrators, teachers, and parents to identify the opportunities that best support the talent development of gifted physics students.