Main factors of influence on growth and development of plants are nutrition, heat, light, air, water [1-7]. During prognosis of increasing of plant biomass and analyzing their yield it is attracted an interests a quantitative analysis of the consumption of the above factors [1,2,6]. In this paper we introduce a model for prognosis of the considered growth of plants. Based on the analysis of this model we analyzed dependence of growth of plants on several environmental factors. An analytical approach for analysis the above model was also introduced.