Tree canopy blocking sunlight to lawn
moderate 2–4 h
Tools: pole saw or pruning saw, loppers, rake, garden fork or core aerator, lawn spreader · Materials: shade-tolerant seed blend (fine fescue) or a shade ground cover, compost or topsoil, mulch
Steps
- Measure the light: an area that gets under three hours of sun a day will not hold turf whatever you plant; mark those zones for mulch or ground cover instead.
- Raise the canopy by removing the lowest branches back to the collar, and thin crossing or inward-growing branches — never more than a quarter of the canopy in one season.
- Rake out moss and dead grass, loosen the soil with a fork, and top-dress with a thin layer of compost.
- Sow a shade blend at the rate on the bag in early autumn or spring, press it in, and keep it moist for three weeks.
- Mow higher under trees — 8 cm (3 inches) — and water deeply but less often so the grass roots below the tree roots.
- Accept mulch or shade plants in the darkest ring around the trunk; a healthy tree and a thin lawn there is the normal outcome.
Stop and call a pro if
- any branch is above head height, thicker than your arm, or near a power line
- the tree is protected, on a boundary, or you would need to remove more than a quarter of the crown
- the lawn also fails in sunny spots — that is soil or drainage, not shade
What a pro does that you can't
An arborist crown-thins and raises the canopy safely from the ground or a rope, and a landscaper reshapes the shaded ring with planting that suits the light rather than fighting it.
DIY cost: $30–80 in seed, compost and mulch