As a gardener tends pole or bush beans in a garden, he must stay constantly vigilant to ensure his beans receive the proper amount of moisture for a successful bean harvest. If beans receive too little water or too much water, the blossoms may not form properly on the vines and the bean pods may not mature for harvesting. Water bean plants carefully throughout the growing season and you will have a bountiful bean harvest.
Set up the rain gauge in an area near the bean plants to monitor weekly rain amounts. If less than 1 inch of rain falls within a one-week-period, expect to water the bean plants.
Assess the bean plants every day or every other day to determine if they require water. Insert your finger into the soil around the plants. If the top inch of soil is dry, provide water for the bean plants.
Water bean plants during the early morning hours for best results. This will allow any moisture that collects on the bean plant foliage to evaporate in the sunshine throughout the day. If you water in the evening and the bean plants go through the overnight hours wet, they may develop fungal infections.
Direct water to the soil with the garden hose or the watering can to give the bean plants water. Avoid splashing water onto the leaves and foliage of the bean plants as you water. Water the bean plants until you saturate the soil completely, but do not create puddles in the soil.