Intercropping of vegetables is experiencing a renaissance with the uptake of organic farming. Cultivation of several plant species simultaneously eliminates negative traits of homogenous cultivation, supports bio-diversity and remains compliant with the rule of balanced agriculture. Carrot and root parsley are two vegetables that have very high requirements towards the conditions of growth. Their cultivation together with other species is a conscious introduction of competitive plants, therefore it was interesting to observe their reaction to intercropping. Among various combinations of compared cultivation types, intercropping with onion turned out to be most beneficial to both carrot and parsley. The ones cultivated together with onion created the highest yield of marketable roots, total yield and yield of leaves. Onion growing next to them had positive effect on the structure of root yield, especially in case of carrot, increasing commercial root share. Intercropping of carrot and parsley with marigold had unfavorable effect on yielding and growth of these vegetables. Intercropping did not affect the number of carrot and parsley emergence, nor yield of fine roots. Total marketable yield of root vegetables obtained from intercropping with onion was greater than that from homogenous cultivation. The effect of intercropping of carrot with parsley was modified by a year of research.

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