Another tip when watering this species is to water it from the bottom. This is for the proper absorption of water to the roots, enabling it to circulate the nutrients from the soil towards its whole body. When you accidentally spill water at the top part, this can cause the development of diseases and fungi.
Use sprinklers when you have irrigation systems. Get the small sprinklers if you have Blue cereused in your garden. It's best to get the revolving ones that allow you to change the water delivery patterns whenever you need them. Avoid turning on the sprinkler on windy days. Make sure to use the soak and dry method regardless if the Blue cereus is in a pot or your garden. This will evenly distribute the moisture across the root systems resulting in healthier growth.
Some owners might want to get a built-in drainage system for their succulents. This is where layers of porous materials like recycled glass or hydro stones are placed beneath the soil. They will generally be a reservoir for excess water, so it's important not to pour too much water into these built-in systems.