The paper presents an analytical approach in defining the organogenesis cycle as a biological basis for modelling ecological functions of growth and development of fruit crops. The interpretation of the organogenesis cycle on the algorithmic basis and the data on ecological factors the computer accessed via the Meteorological Centre made possible the defining of a model of ecological functions of the organogenesis cycle in fruit crops. The model developed in this way, on the basis of average values of several-year functions and recorded variations of ecological parameters within each defined stage and substage, would increase its preciseness in time, concerning the estimation of the moment of their onset or the expected degree of productivity from ecological or biotechnological aspects. The model can also be developed as a basis for integrating all elements of the technological process (protection, nutrition, etc.) in a highly intensive fruit growing.