The aim of our research was to show the impact of covering Chinese cabbage (Brassica pekinensis Rupr.), cultivated in Southern Poland in field conditions, with non-woven fleece, on the accumulation of chosen heavy metals in plants. The heavy metals (Cd, Pb, Cu, Mn, Zn) were analyzed in young plants immediately after removing the covers, and in the mature cabbages during harvest. The levels of trace elements in the external and the internal leaves of the cabbage head were also compared. After removing the covers, the lower levels of heavy metals were observed in covered Chinese cabbages in comparison to the control plants grown in an open field. In turn, during harvesting, much higher levels of heavy metals were found in plants covered with fleece, except Mn and Zn, where accumulation did not depend on the method of cultivation. The content of Cd, Pb, and Mn turned out to be much higher in the external leaves in comparison to the internal leaves. However, the internal leaves accumulated statistically much more copper and zinc in comparison to the external leaves of the plants.