Abstract: The article explored the key components and concentrations of elements in the Iris culture nutrient solution. By using the four-factor and three-level orthogonal design and by analysis of variance, the authors studied the effects of different nutrient solutions on the growth of Iris root, leaf and plant height. The results showed that K₂SO₄, MgSO₄·7H₂O, CaCl₂ and KH₂PO₃ were the major influencing factors in hydroponic culture of Iris. The optimal combination of the elements was 809 mg/L K₂SO₄ 945 mg/L CaCl₂ 493 mg/L MgSO₄·7H₂O 153 mg/L KH₂PO₃. Iris tectorum Maxim. was an excellent ground cover plant species and had high ornamental value. Currently, soil culture method was used more often in culturing Iris than hydroponic culture method. Exploring hydroponic culture techniques can not only fill the research gaps, but also cultivate Iris with high efficiency and low cost. The study could provide a basic formula and a sound base for further research on Iris.