A flourishing garden takes a lot of time and effort.
After you fill the olla with water, it will slowly leak the water into the soil.
When you refill your olla, check for any stagnant water.
If there is any, verify to remove it.
Generally though, you shouldnt have issues with bugs breeding in the water since the olla opening is covered.
An olla is also useful for keeping your garden beds watered while youre on vacation.
How to Use an Olla to Water Your Garden| Sunset