Based on the perspective of evolutionary economic geography and combined with a longitudinal case study of more than 30 years on the flowers and trees industrial cluster in YanLing county, this article focus on discussing how the microscopic actors (households and enterprises) in agricultural cluster co-evolve with the meso-level industrial networks and the external macroscopical environment (institution, technology and space) and co-dominate the evolution of the cluster. The findings show that:①the evolution of the agricultural cluster has the synergistic effect with the evolution of its basic actors, such as households and enterprises, industrial networks, technology, institution and geographical space; ②in different stages of cluster development, enterprises, network, technology, institution and space have their own evolutionary characteristics. Organizational innovation of the microscopic actors changes to adapt to the macroscopical environment and in turn, the changes of macroscopical environment and geographical space are the integrated embodiment to the microscopic changes; ③in the process of fostering agricultural clusters, we should not only attach great importance to the demonstrative effect of successful households and enterprises, but also pay attention to geographical proximity effect for the entire industrial network, technology, routine formation and the role of space reconstruction.