You should water basil regularly to keep the soil moist but not soggy. Generally, basil needs about 1 inch of water per week, which translates to watering deeply once a week for garden plants to encourage deep root growth

. However, the frequency depends on several factors such as whether the basil is grown in a pot or in the ground, temperature, humidity, soil type, and sunlight. Key watering guidelines:

• For basil in containers or pots, water more frequently-about every 3 to 4 days-because the soil dries out faster

• For outdoor garden basil, watering once a week is usually sufficient, but in hot weather, watering every 1 to 3 days may be needed

• Indoor basil often requires watering every 2 to 4 days due to quicker soil drying indoors

• Always check the soil moisture by feeling the top 1 to 2 inches; water when it feels dry to the touch

• Water in the morning to allow leaves to dry and reduce fungal risks

• Avoid overwatering, which can cause root rot and yellowing leaves

In summary, water basil about once a week outdoors in the garden, and every 3 to 4 days for potted or indoor basil, adjusting based on soil moisture, weather, and plant size