The studies conducted at the Research Institute of Horticulture in Skierniewice were aimed to compare the effectiveness of different weeds management methods and determination of their influence on the yielding of celeriac, snap bean, outdoor grown pepper and red cabbage. Two-year experiments were carried out for each vegetable species. The effectiveness of such methods as mechanical treatments, the usage of mulches (propylene, biodegradable films and from cover crops), cover crops incorporated with the soil and hand weeded were compared. Weed control effect, number and biomass of weeds, secondary weed infestation and yield of vegetables were determined during the experiments. The best results of weed control were achieved in crops mechanically weeded (pepper, red cabbage) and weeded by hand. From all of applied mulches the propylene mulching caused the best weed control. The highest yields of celeriac roots and pepper fruits were obtained from crops weeded by hand and the highest increase of yields of red cabbage and snap bean was noted from plants grown in the soil mulched with polypropylene films. From crops weeded by hand and the highest increase of yields of red cabbage and snap bean was noted from plants grown in the soil mulched with polypropylene films.