Carrot (Daucus carota L.) is one of the most popular and ancient vegetable crops grown throughout the world. However, in Ethiopia and other tropical countries, its production is limited by many constraints of which unavailability of seed is the most important. Therefore, this paper is undertaken to review the efficacy of sowing date and planting density on yield and quality of carrot seed production. To optimize the yield and quality of carrot seed identifying the appropriate sowing dates and planting density would help. Seed yield per plant was significantly correlated with numbers of branches per plant, plant height, umbel diameter, and number of umbels per plant, number of umbellets per umbel and seed weight per umbel. The seed yield per plant and per hectare decreased significantly with a delay in planting from November to January. Irrigation and delayed harvesting also exacerbated the incidence and severity of Alternaria leaf blight; therefore, it should be using the recommend inter rows spacing for both seed-to-seed and root-to-seed carrot production methods. Generally, it realized from this review sowing date and planting density affect carrot seed quality and yield. However, there were a possible way to alleviate the problem by selected a local improved variety (Harmaya I) and sowing this variety at a right time with optimum plant density. The recommend inter rows spacing for both seed-to-seed and root-toseed carrot production methods 20 m-30 cm and 50 cm-75 cm respectively for good quality and high yield of carrot seed production.