@rocha.24.rocha Ok, could be genetics to why you're not seeing as many trichomes as you'd like. Some plants just don't produce as many trichomes as others. Another thing you can look at doing is adding UV and/or more blue light for a few hours each day. The plant will then create more trichomes as a defense mechanism.
What grow light are you using? What strain are you growing? Got a pic of the plant?