I have a customer who in their backyard has no grass due to heavy shade from trees. there are some patches in a few areas. He wants me to try some shade mix and slit seed it. I explained some of the downfalls to this but he is willing to give it a try. With being summer, & shaded, what are some recomendations or advice, tips for me to get him some grass growing? Luckily his property is very cool in the back as from the shade, but also doesn't seem to get lots of sun regardless. Thanks in advance for any help.