Minecraft wiki entry for Sweet_Berries, associated text: A sweet berry bush grows through four stages after it is planted. Its first growth stage is a small bush without any berries. It becomes a grown plant in its second stage, and produces berries in its third and fourth growth stage. The bush needs to be in light level 9 or greater to grow. Using bone meal on it increases its growth stage by one, and at full maturity, ejects the sweet berry item. The bush can be placed on a 1 block high space, but it cannot grow with a full, non-transparent block immediately above it.