Cumbers of a parthenocarpic variety Marinda F₁ were grown in the field under protective shields, i.e. a perforated PE sheet and PP needled cloth (17 g·m^-2), during the years 2001–2003. Unshielded plots served as the control treatment. It was found that the concentrations of nitrogen, calcium and iron increased significantly in cucumber plants grown under PP needled cloth. The edible parts of cucumbers were characterized by widened K : Ca, K :  (Mg+Ca) and K :  Mg ratios, as well as by favorable Ca :  Mg ratios.

The effect of auxins: IAA, IBA and NAA in concentrations of 1.0, 2.5 and 5.0 mg·dm^-3 on rooting of Hebe buchananii and Hebe canterburiensis ‘Prostrata’ in vitro was examined. Shoots used in the experiment were excised from aseptically grown shoots on 1/2 MS media. Auxins used in the experiment were showed to have a positive effect on rooting of shoots of Hebe buchananii and Hebe canterburiensis ‘Prostrata’ in vitro. The biggest number of rooted microshoots and the longest roots of Hebe buchananii formed in presence of IBA. On the media supplemented with IAA in concentrations of 2.5 and 5.0 mg·dm^-3, IBA in concentration of 5 mg·dm^-3 and NAA in concentration of 1 mg·dm^-3 100% of rooted shoots of Hebe canterburiensis ‘Prostrata’ were obtained. The biggest number of roots occurred on media with 2.5 and 5.0 mg IAA·dm^-3. NAA added to the media caused callusing of the shoots base.

The research focused on the effect of GA₃ and BA on the yield of Allium karataviense ‘Ivory Queen’. The substances in concentration of 500 mg·dm^-3 were applied in the form of a 60-minute bulb soaking prior to planting or plant spraying in the green bud phase. It was discovered that GA₃ applied in the both forms causes the inflorescence shoot elongation and the increased number of flowers in inflorescence, and increases the total yield expressed in the bulb weight. When applied in the form of plant spraying, it increases the number of bulbs in the total yield. Plant spraying with BA leads to the production of a greater number of flowers in inflorescence. BA application in the both forms increases the total yield expressed in the bulb weight.

The field studies were carried out in 2002–2004 on brown soil of loess origin. In the experiment the following methods of plantation establishment were compared: direct sowing in the field (control); direct sowing in the field with cover of polypropylene sheet; by seedlings from plastic house; by seedlings produced in multicell propagation trays. There were two dates of leaf cutting: in August and before root harvest (October). Plants cultivated from seedlings were significantly higher and formed greater number of leaves as well as greater weight of above and under ground parts than in the cultivation from direct seeding, but the best results were obtained in the object with seedlings produced in multicell propagation trays. The use of polypropylene sheet positively affected the above ground parts of lovage, however caused significant decrease in root mass. Leaf cutting in the summer was connected with decrease in fresh root weight (by 40% in relation to plants with no leaf harvest) and essential oil content (from 0.85 to 0.52%). More active substances in lovage roots were accumulated in the plants obtained from direct seeding than from transplants.

The effect of benzyladenine on Astilbe × arendsii Arends flowering was determined. The cultivation of Astilbe × arendsii in an unheated plastic tunnel reduces the inflorescence yield in the first and second year of flowering as compared to the field, but increases the fresh weight and lenght of inflorescence stems.