The elm tree serves as a super host plant for over 30 galling species, facilitating their gall formation on it. Notably, galling aphids possess the ability to trigger de novo organogenesis on the elm tree. Each species of galling aphid orchestrates the creation of its unique gall, termed species-specific gall formation. Unlike leaves and roots, galls manifest as distinct plant organs rapidly formed in response to parasitic organisms, evident across a spectrum of plant species. However, the precise mechanisms underlying the interruption of normal plant development and redirection towards gall formation by galling organisms remain elusive. In this study, we aim to unravel the complexities of gall development by challenging non-model organisms by employing high-resolution omic analysis to dissect every early stage of gall organogenesis and meticulously track cellular reorganization throughout gall development.