Background : Generally, price of Jiwhang(Rehmannia glutinosa L.) is highest in August. In this study, Economic Evaluation and Productivity of 9 Jiwhang varieties w ere analyzed according to harvesting tim es of August and October. Materials and Methods ○ Experiment variety : Jiwhang 1, Korea jiwhang, Daegyung, Gogang, Togang, Dagang, Wongang, Hwanggang and Yeongang ○ Treatment : ①Initial-August harvest ②Mid-August harvest ③Ended-August harvest ④Ended-October harvest ○ Planting date : April 17, 2015 ○ Planting distance : 30×15cm ○ Experiment place : Ginseng and Medicinal Plant Research Institute (Geumsan-gun, Chungcheongnam-do) Conclusion : The higher roots yield at August harvest was in Gogang, Dagang and Togang. The lower roots yield at August harvest was in Korea jiwhang and Hwanggang. The higher economic feasibility at August harvest was in Gogang, Togang, Dagang and Wongang. The higher economic feasibility at ended-October harvest was in Gogang, Yeongang, Togang, Dagang and Wongang.

• Seung Ho Han(Ginseng and Medicinal Plant Research Institute, CNARES) | 한승호
• Gwan Hou Kim(Chungcheongnam-Do Agricultural Research and Extension Services) | 김관후
• Bong Jae Seong(Ginseng and Medicinal Plant Research Institute, CNARES) | 성봉재
• Sun Ick Kim(Ginseng and Medicinal Plant Research Institute, CNARES) | 김선익
• Ka Soon Lee(Ginseng and Medicinal Plant Research Institute, CNARES) | 이가순
• Su Dong Kim(Ginseng and Medicinal Plant Research Institute, CNARES) | 김수동
• Moo Geun Jee(Ginseng and Medicinal Plant Research Institute, CNARES) | 지무근
• Young Hwan Yoon(Chungcheongnam-Do Agricultural Research and Extension Services) | 윤영환
• Hyun Ho Kim(Ginseng and Medicinal Plant Research Institute, CNARES) | 김현호 Corresponding author