Abstarct: Due to excessive use of chemical fertilizers, the environment and human nutrition is faced with the fundamental problem. In this context, an experiment to study the effect of fertilizer on 8 levels, "a witness, Iron, zinc, humic, iron + zinc + humic, humic iron + iron + zinc + humic " And the time of harvest, "August and September." A split plot randomized complete block design with three replications in field conditions in Gorgan weather conditions during the crop year 94-1393 on the lemon herb (Lippia citriodora) was conducted.In this study, the main causes of Harvest Time And the subplot treatments, and traits such as plant height, Number of leaves, leaf area, fresh weight, dry weight, stem diameter, phenols, flavonoids, antioxidant, essential oil content and limonene were measured. The results showed that the highest plant height (21/72 cm) related to the interaction effects of fertilizer application and harvesting time is at 5% in August. Most leaf area (square centimeter 12/563) in the treatment of the interaction of humic acid fertilizer and harvest time in October at 5 percent. The results showed the highest antioxidant (free radical 88/44 percent) related to the interaction between fertilizer and harvest dates were August. The highest essential oil content (57/3 per cent) related to the interaction between the fertilizer and harvest time in August And the highest limonene (324/16%) in the fertilizer treatment and harvesting time interaction was August.