The aim of the presented study is to demonstrate the recovery effect from the virus diseases on improvement of physiological characteristics and the yield formation of the saaz semi-early red-bine Osvald clone 72 plants, the Czech classical variety of the finely aromatic hops. The recovered and the non-recovered hop plants were studied in the experimental hop garden in the Czech hop-growing region in years 2000 and 2001. The photosynthetically active leaf area (vine leaves and axil leaves), the net photosynthetic rate, the dry matter of vine, the leaves and yield formation of cones were assessed during a growing season in the selected phases of the hop plants ontogeny. The presence of viruses shortened the growing season of the non-recovered hop plants. The influence of the biotic stress factor accelerated the accession to the generative phase of their development and at the same time shortened the time period of the hop cone creation. The hop plant recovery elongated the period of photosynthetic activity of leaves and formation of hop cones. The virus-free hop plants gave higher yield. The recovered and the non-recovered hop plants have a different accession to the critical developmental periods important for the hop cones yield formation. The acquired information is very well applicable in preparation of the virus-free hop growing technologies and in the process of plant breeding.