The presented work demonstrates new results of studying the photoluminescence kinetics of green leaves of Brassica rapa L. that were separated from the parent plant and in fact is the logical development of our studies. We found that the time dependence of its intensity includes 2 stages characterized by the fact that in the first one there is an increase in intensity, reaching a maximum and then decrease, but with long drying times in conditions of constant room temperature, it does not fall below its characteristic value for a living plant.