When you do water, go slow. You want water running out of the drainage holes at the bottom of the container - that means it’s reached the roots. Think long and steady, not a quick splash.

Keep in mind, that if you let your containers dry out completely, they can become hydrophobic when you go to water next - meaning the water just runs off the soil and doesn’t actually soak through. Make sure that when this happens, you give your soil a few good soakings until the soil is consistently moist again.