Turf for Shady Yards, Wet Feet and Low Maintenance
There are things that can be done to improve shade tolerance of lawns. Firstly mow high, at around 50 to 60 mm in shady spots. Fertilise well at least 4 times per year with slow release fertiliser, and prune trees and shrubs to increase light penetration.
Trees suck out water, so irrigate more under trees, but also ensure there is adequate drainage, as wet shade really hurts turf. And finally, make sure the ground is not too compacted, by aerating every couple of years.