Nutrition is an important orchard management factor. In integrated fruit production (IFP) there is a tendency to reduce the impact of some elements like nitrogen from soil applications and to replace them by leaf applications. For some elements like magnesium or manganese a leaf application can be a very efficient way to prevent deficiency symptoms on the leaves; for other elements these effects can not be proved sufficiently. In this paper we discuss some standard nutritional practices of Belgian fruit growing; for some of them there is sufficient scientific support for others there is not. A general overview is given in which the different foliar applications are positioned in function of the phenological evolution of fruit trees.