Fertilize at your own insight. The advantages of Promix; ● Fertilize as desired. Because no nutrients are added to Promix, it is suitable for the more experienced grower. You are directly in control of the fertilization. ● Rapid rooting. Promix has a low EC value since it is not pre-fertilized. This is ideal for young plants, because they will experience little stress. Your plant can root quickly and therefore has a healthy basis for stable growth. ● Suitable for organic growing. Promix is certified by Control Union, which means that this substrate is suitable for organic cultivation and is good for people, animals and the environment.