Both have their pros and cons. Some factors to consider are:
The cost and availability of the fertilizer. Powdered fertilizer is usually cheaper and more widely available than liquid fertilizer, but it may also have a shorter shelf life and lose its potency over time. Liquid fertilizer is more expensive and may require special storage conditions, but it may also last longer and retain its quality.
The ease and convenience of the application. Powdered fertilizer needs to be dissolved in water before applying, which may take some time and effort. Liquid fertilizer is ready to use and can be applied directly to the soil or foliage, which may save some time and hassle.
The accuracy and consistency of the dosage. Powdered fertilizer may be harder to measure and mix accurately, which may result in over- or under-fertilizing your plants. Liquid fertilizer is easier to measure and adjust, which may allow you to tailor the dosage to your plants’ needs and preferences.
The impact on the soil and the environment. Powdered fertilizer may leave behind salts and residues in the soil, which may affect the pH and nutrient balance of the soil. Liquid fertilizer may be more easily absorbed and utilized by the plants, which may reduce the risk of salt buildup and nutrient runoff. However, both types of fertilizer may contain chemicals and additives that may harm the soil microorganisms and the surrounding ecosystem.