This paper explores the impact of short-term phenological changes, specifically the start of the growing season, on planting practices and agricultural outcomes in Nigeria. Farmers exhibit limited adaptation strategies, primarily adjusting their planting schedule to plant later when the season arrives earlier than usual, and resulting in a 5 percent decrease in yields for each week the season is anticipated. Household food expenditures are unchanged as farmers use stored production from previous seasons to smooth their consumption. Furthermore, this paper underscores the potential role of agricultural information and extension services in mitigating timing-related risks.