Those deep roots sit for long periods of time in waterlogged soil and soon suffocate from lack of oxygen. I read that strawberries and roses are related. That was no mistake. Roses and strawberries are members of the same family, and so are apples, pears, blackberries, raspberries, cherries, plums, apricots and almonds. Fescue, one of the most shade-tolerant of all turf grasses, will grow in full sun, but you have to water the dickens out of it to keep it green.
Tall fescues are more drought-tolerant, but their blades are too coarse for lawns.
Find a blend specially made for your area. Most include some combination of creeping, tall and fine-bladed fescues. An organic gardening fanatic insists that foods grown organically taste better. Plants don't know whether the nutrients they receive from fertilizers come from organic or synthetic sources. But because organically grown plants are healthier plants, they could have the potential to taste better.