In July the canopy over Woods Lane closes in, and the shade travels across the lawns below it like slow water. GreenTech Lawn & Tree Inc works both layers of an East Hampton yard, the grass and the trees above it, mowing and edging below, pruning and shrub shaping overhead. Shade lawns out here have their own temperament, thinner where roots compete for the sandy ground, and the remedy is regular cutting and honest cleanups rather than anything clever. Autumn drops the leaves all at once, and raking them out is what keeps the turf breathing into winter. A yard where the trees and the lawn are on speaking terms is a fine place to stand.