Do hydroponic flowers need their nutrient solution changed regularly?

The roots of hydroponic flowers sit in nutrient solution, and the buffering capacity of nutrient solution is poorer than that of a growing medium. Because of plant metabolism, new roots are constantly produced and old roots constantly die; the toxic substances produced by roots rotting in the water and secreted by the roots are harmful to root growth and development. In addition, because different flowers absorb nutrients differently and selectively, the nutrients in the nutrient solution often become unbalanced. Sometimes a nutrient deficiency causes physiological disorders, and temperature's effect on pH can also cause imbalance, which is especially obvious in hydroponic methods, because the plant roots are immersed in water and water has very poor buffering capacity. Therefore hydroponics requires regular solution changes. In winter, spring and autumn, change the solution once every 1 month; in summer, change it once every half month.