How often should I water blueberries, and what are the intricate factors that influence the watering needs of these exquisite plants? Given their penchant for moisture, what has been established as the optimal frequency for irrigation to ensure robust growth and prolific fruiting? Is it best to adopt a consistent schedule, or should I be more attuned to the subtle shifts in weather conditions and soil moisture levels? Furthermore, how do variables such as the plant’s age, the type of soil, and the surrounding climate impact the amount of water required? Could there be significant differences in the watering regimen during various stages of growth, such as during flowering versus the fruiting phase? Additionally, how can I ascertain when the blueberries are receiving too much or too little water, and what signs should I be observing in the plants to gauge their hydration needs accurately? Are there particular techniques or tools that could assist in monitoring soil moisture levels effectively?