A study on the yield of rhubarb variety ‘Wiśniowy’ was carried out in the years 1995-2002 in the Experimental Station of the University of Agriculture in Lublin. The aim of the research was to estimate the relationships between winter thermal conditions and the yield structure during seven successive years of running plantation. The weather conditions during the winter months in the years 1995-2002 were characterized by the coefficient of winter severity. On the grounds of calculated values (CWS) it can be stated that thermal conditions during winter had a large effect on yielding earliness of this vegetable. According to the years, the first harvests of leaves were carried out in different terms. In the years 1998-2002, with winters classified as mild, the first harvest was carried out in April. In the year 1996, with winter classified as frosty (CWS = 6.26), first harvest was on the 8th of May. No significant correlation was found between the mean air temperature during the winter months (December-March) and the total, marketable and early yield, the number of leaves picked from one plant and the average leaf petioles mass.