This paper presents the activity level of total organically bound tritium (OBT) in different plant species, e.g., grains (wheat, corn), trees (apple, fir), and vines, and different organs of the plants (buds, leaves, fruits, straw, and branches) surrounding the Experimental Pilot Plant for Tritium and Deuterium Separation during the growing seasons of 2020 and 2021, The influence of environmental factors over OBT in the studied plant species is established by measurements of the tritium activity level in air and precipitations and their influence over tissue-free water tritium activity.