Many amateur fruit growers are concerned at times because their trees do not begin to bear as soon after being planted as they had expected or do not bear as abundantly as they wish. In some cases after bearing for a period of years the trees cease to produce, or bear irregularly. While sometimes, the reason for a fruit tree not bearing may be obscure and not explainable on any known basis, in the majority of cases such failure is due to some one of several well recognized factors. The more common of these are here briefly discussed.