We focused our study on the relationship between ring width formation of silver fir and the climatic factors. Therefore, we collected material on two sites of the Northern Apennines at different altitudes, slopes and soil characteristics and compared tree ring width with meteorological data from a neighbouring station. The results are that the ring growth depends mainly on the winter mean temperature of the current year, the summer precipitation and the mean summer temperature of the preceding year. The influence of year mean temperature is more pronounced at high altitudes. The mean summer temperature and summer precipitation had a stronger effect on the growth year at lower altitudes and on the following year at higher altitudes
