Picture me pointing a long-handled filbert paintbrush at you. I shan't make you happy here. :-) Typical for me, I didn't rinse it first and I just got paint all over myself, so there's that. I'm used to it.

Water as needed. For a new lawn, in summer, on a spring planting, observation is going to be your friend. The lawn is young, weak, and very susceptible to disease...and to drying out. This can be like walking a tightrope.

A good rule of thumb is going to be twice a week but...this is a slope. The top may need every other day while the base is too sodden and rots. In that case, keep the time down up top. You see what I'm getting at here.

A cooler summer would mean to water a bit less. Hot weather, water more. If you see disease...don't diddle about, react instantly this one year. The lawn's too young to withstand it.

It's going to take a lot of attention.