This paper aims to show the relevance of spatial proximity and social capital in accelerating the spread of agricultural technologies such as integrated pest management (IPM). The research was done in response to the problem of slow diffusion of agricultural technologies. Both quantitative and qualitative methods were used in investigating the process of sharing and learning of IPM. Results show that social capital in terms of kin networks and spatial proximity such as found among farm neighbours are essential in the learning process and hence, diffusion of IPM among Filipino farmers. Kin networks and farm location are then important considerations in sampling participants strategically for the long-season IPM farmer field schools (FFS). (Contains 4 tables and 4 figures.)