Conversion of municipal waste sludge into products with economic value by using recycling methods is extremely important for sustainable environmental management. The aim of this study is to determine the effect of vermicompost obtained from red California earthworm fed with municipal sludge and clay mixture on the growth of Daphne odora Thunb. ‘Aureomarginata’plant. In order to produce vermicompost, 2 different (wastewater sludge (100%) and wastewater sludge (50%) + clay soil (50%)) feding materials were used. The research was carried out in the plastic box with a width of 40 cm x 40 cm length x 20 cm in accordance with the randomized plot design in three repetitions. As a result of the research, the number of worms in the wastewater sludge (100%) feding material decreased during the first 5 weeks and then increased. The worm weight in the wastewater sludge decreased by 6.20% during the first 2 weeks, increased from the second week to the 6th week, and then decreased again. The number of worms in the medium consisting of a mixture of wastewater sludge (50%) + clayey soil (50%) increased in the first week, then decreased linearly. As a result of the conversion of the waste sludge into solid vermicompost by vermicomposting technique, there was an increase of 9-25% in all 11 parameters measured in the waste sludge. Among the parameters, the highest increase occurred in the amount of IC, while the lowest increase occurred in the Na value. It was determined that the difference between Ca, Zn, TOC and IC values was statistically significant. The highest growth in height, the highest number of leaves, the highest root collar diameter, the highest root length, the highest root weight, the highest leaf weight, the highest stem weight, the highest flower weight, the highest above-ground biomass ratio was obtained in plants where vermicompost obtained from wastewater sludge (%) 50) + clay soil (50 %) growing medium.