I'm having difficulty growing grass in the shade. Do you have a seed mixture that will succeed in these areas?
Yes, I do and it's called Shady Nooks. The shade caused by trees results in tree root competition with the lawn grasses for the available food and water.
If possible aerate the lawn under the shade trees and work some organic material such as humus into this area to aid in moisture retention. You will also want to lime the shaded areas more frequently to maintain soil pH. Fertilize the lawn under the trees more frequently but with a reduced application rate. This will help to keep food available for the grass plants during the growing season. You see growing grass in the shade is really not that difficult!