When applying TurfGrassPro 18 - 3 - 6 50% SRN with Minors, children and pets should be out of the treatment area until the application has dried completely. Typically after 4-6 hours.
TurfGrassPro 18-3-6 with Micros can be used on warm and cool season grasses, including Fescue.
What fertilizer you need is going to vary depending on what nutrients are needed in the lawn throughout the year. We actually have a great guide that can explain how to select the best fertilizer for your lawn. You can find the guide here