Анотация: In 2001 - 2003 at the Fruit-Growing Institute - Plovdiv a field experiment was carried out on alluvial-meadow soil (Fluvisol) for studying the effect of the soil herbicides napropamid, pendimethalin, terbacil and metolachlore on the vegetative habits of Mahaleb cherry seedling rootstocks.. - During the period of vegetation observations were carried out on plant growth and development - emergence and external symptoms of toxicity. In October the rootstock quality was determined reporting the following biometric indices: width in the grafting zone (mm), stem height (h-cm) and aboveground mass (g).. - The results obtained showed that napropamid - Devrinol 4 F - 400-500 ml/da, pendimethalin - Stomp 33 EC - 400 ml/da and metolachlore - Dual Gold 960 EC -150 ml/da could be applied in the production of Mahaleb cherry seedling rootstocks.. - The soil herbicide terbacil (Sinbar 80 WP) had a strong toxic effect on the development of Mahaleb cherry seedlings causing their death.. - The inhibiting effect of the soil herbicide metolachlore was expressed after the application of the highest rate of Dual Gold 960 EC -187.5 ml/da