Low porosity hair requires special care when it comes to moisturizing, as the hair cuticles are tightly closed and can make it difficult for moisture to penetrate. As a general guideline, you should aim to moisturize low porosity hair every 2-3 days, or as needed based on how your hair feels.
It's important to use the right type of products when moisturizing low porosity hair. Look for products that are lightweight and water-based, as heavy products can sit on top of the hair and not be absorbed. Consider using a leave-in conditioner or hair oil to help seal in moisture after you have moisturized your hair.
In addition to moisturizing regularly, it's also important to avoid using heat styling tools too often and to protect your hair from harsh environmental factors such as sun exposure and wind. Using a deep conditioning treatment once a week can also help to keep your hair hydrated and healthy.