While it depends on the specific plant(s), the general rule of thumb is to wait until the top 1-2 inches (2.5-5 cm) of your plants soil is completely dry before watering again. Watering your plants on a schedule is great, but deciding when to water based off your plants soil is generally a better option. This ensures that you're not over or under watering. For tips for your specific plant, search for your plant in the guide above!