Silica (SiO2) nanoparticles are known for their ability to attach different types of other particles and carry them to target destinations. Application of commercial SiO2 nanoparticles as a carrier of ascorbic acid particles was studied. The size of SiO2 nanoparticles was 10-20 nm. Ascorbic acid (AA) plays an important role in physiological processes in plants: growth, metabolism and adaptation (Y. Zhang, 2013). The role of SiO2 nanoparticles was to attach lots of AA particles and thus ensure greater consumption of AA by a plant during its growth. Adherence of AA particles to SiO2 nanoparticles was studied using spectrophotometry measurements. Comparison of the experimentally measured and theoretically calculated optical absorbance spectra showed that AA + SiO2 complexes were formed when SiO2 and AA particles were mixed in triple distilled water. The complexes remained stable at least during 24 hours. Influence of the AA + SiO2 complexes on flax plant ('Blue di Riga') callus cell cultures was studied. Callus cultures are unorganized plant cells that grow and divide, forming clusters of cells. Callus cultures are widely used in research related to the study of the influence of various substances on the cells, as the impact of these substances on callus cells can be observed easily. Number of regeneration areas was counted after 3, 4 and 5 weeks of callus culture cultivation in the growth medium. Regeneration areas are accumulation of cells where plant regeneration occurs later. Student’s t-test showed statistically significant difference between the control groups and the groups cultivated using AA + SiO2 complexes. Results suggest that use of SiO2 nanoparticles in combination with ascorbic acid particles improve plant vegetation by increasing number of regeneration areas of callus tissue and increasing callus size.