At the beginning of your grow, you will likely be watering your marijuana plants every couple of days. Watering every 2-3 days is optimal for a young plant. If it’s taking too long for your plant to dry out, you may need to give less water at a time until the plant is growing faster. If you feel like you are watering your plants too often, you may need to give more water at a time. You can also move plants into a bigger pot (which holds water for longer). If plants take longer than 3-4 days to dry, make sure your potting mixture has good drainage and consider giving less water at a time. If plants are drying out in 1 day or less, try giving more water at a time or transplanting to a bigger pot