Three fractions of lovage seed: small size 2.5 mm, medium size 3.0 mm, and large size 3.5 mm were analyzed in this paper. Contents of small fraction were 23 %, medium 46 %, and large 31 %. The infraction seed was used as standard. The indicators: germination energy, total germination and seed weight were investigated. The best results had the broadest fraction of 3.5 mm concerning all indicators.

Rapid development of plantation-commercial production of medicinal plants demands certain quantities of adequate quality seed. Preliminary results for yield and quality of artichoke seed obtained from one-year and two-year crop plants with two variants of vegetation space sizes are presented. The 'Domestic large' variety was tested. The highest yield of seed was achieved in two-year artichoke plants grown in the variant of 70x50 cm row spacing.

The preliminary results of a two-year comparative investigation of two genotypes of ribwort-plantain in the agroecological conditions of west Serbia (Gorobilje), south Banat (Pančevo) are given. Genotype originating from the international exchange (marked with 'D') was compared with 'domestic' genotype which has been raised at the Medicinal Plants Research Institute 'Dr Josif Pančić', Belgrade, for more than ten years.