The present invention relates generally to the field of molecular biology and concerns a method for enhancing yield-related traits in plants, in particular for increasing plant yield and/or early vigor, relative to control plants. More specifically, the present invention concerns a method for enhancing yield-related traits comprising modifying the expression of a nucleic acid encoding a HAL3 polypeptide, MADS15 polypeptide, PLT transcription factor polypeptide, basic/helix-loop-helix (bHLH) transcription factor, or SPL15 transcription factor. The invention also provides constructs useful in the methods of the invention.