The frequency with which you use additives depends on the product and the growth stage of your plant. GT Silica can be used at every watering to enhance structural strength. Rootzone is great for the entire lifecycle, ensuring your roots stay healthy and your plants can absorb nutrients effectively. Super PK, designed specifically for the flowering phase, should be used only during that period for maximum impact. Each product comes with easy-to-follow instructions, ensuring you use them correctly and effectively.