The technique of aeroponic culture is an alternative of the soil-less culture method in growth-controlled environments. The underground organs are enclosed in a dark chamber and supplied with a solution of mineral nutrients with a mist device. Aeroponic system optimizes root aeration, which a major factor is leading to a yield increase as compared to classical hydroponics. Other advantages have been including the recirculation of nutrient solution, a limited amount of water used, good monitoring of nutrients and pH. This technique has been applied successfully for the production of different horticultural and ornamental species. Harvesting in aeroponics is convenient, clean, and allows a greater size control by repeated harvesting. To this purpose aeroponic system and soil culture in Valerian, Chicory, Withania and Echinacea were investigated. The results indicated that the effects of production system were significant and aeroponic system has produced the highest of plant height, root length, number of leaves, dry weights of the shoot and root, fresh weights of the shoot and root, Chlorophyll a, Chlorophyll b and carotenoids traits in studied plants. In overall, these result showed that the aeroponic system is a potential method for using in Valerian, Chicory, Withania and Echinacea.
