The study was carried out from June to December, 2014. The objective of this study was to determine a suitable topping time for sweet basil variety grown in the net house at Research and Development Center for Hi-Tech Agriculture Ho Chi Minh City. A two factorial experiment was designed by the CRD (Completely Randomized Design) with three replications. | Effects of topping times on growth and yield of three sweet basil Ocimum basilicum L. varieties cultivated in the net house