Planting Date Effects on the Performance, Performance Components, and Essence Volume of the Herbal Plant Carum copticum

In order to investigate and compare the effects of two different planting dates on the performance, performance components, and essence volume of the medicinal herb Carum copticum, the present study has conducted an experiment as factorial in the form of complete random blocks with three iterations in the agricultural year of 2012-2013 in Behbahan, Khouzestan, and south-west of Iran.In this experiment, these two planting dates (i.e., October 2 and November 1) have been considered as the major factor while the essence volume is the minor factor. Morphological characteristics and rate of essence production have been recorded. As the results show, the consideredcharacteristics (i.e., the height of the plant, number of leaves, number of branches, stem diameter, leaf dry weight, total wet weight, essential oils weight, and plant weight) exhibit a significant differenceat the 1% level on the two planting dates.Except for the leaf fresh weight and stem fresh weight that have demonstrated a meaningful difference at the 5% level, thestemdry weight, in florescence dry weight, total dry weight, and root fresh weight have shown no significant difference at the 5% level on the two planting dates.According to the results, for production of higher crop yield in Behbahan, the planting date October 10 is recommended.