Do you have a pH and/or tds meters? Those will help optimize plant nutrition and help avoid any losses that could otherwise be avoided. If you don't have them and are looking I have some great and very affordable recomendations. For most just the peace of mind of knowing the "exacts" are worth it. Can't tell you how many people I've seen agonize for hours trying to decipher colors on litmus paper or in ph vials, or wonder about
nutrient concentrations.