Background : Black Non-Woven Fabric Mulch Culture was knowned increased crop Yield and saved weeding labor in Liriope Pilatyphylla Wang et Tang. But to the removal and planting labor is more needed, So some famers are avoidance that culting method. Methods and Results : So this study was experimented in order to selecting optimun removal time in Liriope Pilatyphylla Wang et Tang mulch culture. Removal time were conventional practices (in April next yesr), September, October and November. In early, Plant length, Root length, Leaf number and number of plants was the long and many by the sooner removal time and also, dry weight was heavier. Black non-woven fabric removal labor was saved by the sooner removal time. The main event of weeds were Cyperus serotinus Rottb and Portulaca oleracea L. In harvest time, Plant length and plants of numbers was the longest and heavier at conventional practice (in April next year) and November removed. Tuberous root number was the more in September removal, Because, the tuber was tall and long. Total1y consideration of the including weeds shooting, weeding labor and Growth and development situation, Black non-woven fabric removal optimum time was September or Conventional practices (in April next year). Conclusion : Black non-woven fabric optimum removal time was the september . In this experiment, increased yield 9, income 16 percent than conventional practices (in April next year).