A field experiment was carried out in the spring of 1991 in São Manoel, State of São Paulo, to study the effects of liming and time of harvesting on peanut seed quality. The soil was a Dark Red Latossol (Hapludult, sandy loam), and the experimental design was a subplot replicated four times in completly randomized blocks. Lime levels (0.0 and 1.75 t/ha) were applied in the plots, and the subplots were 9 weekly harvests, starting at 87 days after planting (DAP). Seed physiological quality was evaluated at each harvest. Seed physiological quality was evaluated again after 6 months of storage at laboratory conditions. Seeds from limed plots showed earlier maturation, a delay in deterioration, and generally a better physiological quality immediately after harvest as well as after 6 month?s storage. The highest seed quality, in lime presence, was obtained from 108 to 136 DAP.