Hi Steve, You could get wild flower seed for shade . Also you can plant some bulbs  in the grass. If you leave the lawn you need to scalp it . Also you need to get yellow rattle growing. Our front lawn is now a meadow. It takes time to evolve, still waiting for our first orchid to appear. But I this worth it. The wild flower borders have looked good. Considering they were poisoned. Will chop it down in September then the. Bulbs come up. Lots of good advice on web. Julie. PS how is the monkey puzzle doing?