Orange producers in many regions of the U.S. are affected by the recurrence of frost. This study evaluated 147 California farmers' perceptions of frost risk relative to other business risks. Freeze risk perception was negatively related, for example, to farm size. Large farmers with diversified businesses had lower perceptions of freeze risk than small farmers. Change in crop location and the adoption of anti-frost technology were two important responses to freeze risk. California farmers shifted their location to frost-prone areas and adopted anti-frost technology. Florida farmers, however, diversified to less frost-prone areas and adopted new planting technologies instead of anti-frost technologies. Key words: anti-frost technologies, diversification, orange frost, ordered probit model, risk perception.