Why fruits don’t ripen is a question that is asked while, often people are eagerly waiting for their tree’s fruit to ripen. The feeling is understandable, as we care so much for the tree. Lack of water can be the reason fruits are stunted. Some fruits might ripen later than others. Some fruits might be in a place, where they are not receiving enough light to ripen or ripen as fast as other fruits at the tips of the branches. However, great fruits do ripen lower in the tree branches, it just may take a bit more time. Summer thinning of branches and fruits is a method horticulturalists use to help promote the development of fruits.