A field grows, but not like a crystal. It grows like an organism. The MorphogenesisGrowthModel names the developmental logic through which a corpus expands: not by accretion of identical units, but by differentiation of structural forms in response to internal and external pressures. In biology, morphogenesis is the process by which an organism acquires its form. In epistemology, it is the process by which a field acquires its shape. The Socioplastics corpus did not begin as 3,000 nodes. It began as a single concept — the socioplastic itself — and differentiated over seventeen years into the current architecture. The MorphogenesisGrowthModel makes this process explicit. It identifies the stages of field development: the initial concept, the first differentiation into thematic clusters, the emergence of scalar operations, the hardening of structural elements, the integration of disciplinary fields, and the executive mode that governs the mature corpus. Each stage is not merely chronological. It is morphological. The field's form at each stage is determined by the interactions between its existing structure and the pressures acting upon it. Node 1508 places this concept in Core III because morphogenesis is one of the seven integrated disciplines. But the model is not about biological development. It is about the developmental logic of epistemic infrastructure. The field is the organism. Its growth is the subject. Without this concept, expansion is understood as addition. With it, expansion is understood as differentiation.