A laboratory experiment was carried out in the Seed Technology Laboratory, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur from August-September in 2004 and 2005 to study the effects of different botanicals on the seed quality of lentils during storage. After processing and drying, seeds were preserved with different botanicals and stored in earthen pots. The seeds were divided into four parts including a part considered as a control. For botanical treatments, three botanicals of whole leaf powders of neem, dholkalmi and bishkatali were used at the doses of 5% w/w i.e., 25 g/500 g of lentil grains. The lentil seeds were stored till the next planting time and the seed quality data on moisture (%), germination (%), dry weight of seedlings and vigor index were observed during the storage period. Germination percentage of the initial seed lot was on average 90%, and average moisture content of the seeds before storage was 9%. Significant influences of the botanicals were observed in germination percentage, dry weight and vigor of the lentils. The highest values for almost all of these characteristics were observed for the seeds preserved with neem leaf powder. Bishkatali showed the same performance as neem.Among the three botanicals, dholkalmi showed the least effect. Neem treated seeds were found to have the highest germination percentage (86.0% in 2004 and 87.2% in 2005), dry weight (0.72 g in 2004 and 0.78 g in 2005) and vigor (62.3 in 2004 and 68.0 in 2005), which were somewhat similar to bishkatali but significantly higher othan the control. No significant difference among the seeds with botanicals on moisture percentage was observed.