What precautions must gardeners take for chemical fertilizers to stimulate plants without damaging roots with too high concentrations?

Conducting soil pH tests, following label instructions, and matching correct fertilizer with correct plant are precautions which gardeners must take for chemical fertilizers to stimulate plants without damaging roots. Fertilizers do not benefit plants if the soil pH is too acidic or alkaline for the plant or if aeration and water pore spaces are insufficient or non-functioning in soils. With adherence to the label's directions in terms of application and timing, chemical fertilizers will do their job correctly as long as they are appropriate for the plant: for example, ericaceous fertilizers must be used with acidic soil-loving plants.