Horticulture in Kenya has frequently been equated in the popular mind with export horticulture. Indeed, the great success of the export sector has lead to a relative inattention to the domestic and regional horticultural production and marketing system. This paper reports on research carried out by Tegemeo Institute to assess the size and scope of this sector, with a special emphasis on marketing. It focuses on the major challenges the sector faces and on key investments and programs needed to move forward.