Gardiner stacks itself up from the Kennebec — a brick main street, Cobbossee Stream falling through town beneath the bridges, the waterfront where the river goes wide and slow. D.K. Lawn Care & Landscaping keeps the lawns on the streets above all that, the corner lots and terraced yards that climb away from the water. Old neighborhoods mean mature maples, granite curbing and small awkward patches of grass, and mowing them well is mostly a question of the trimming afterward. Summer here runs humid and green, and a lawn cut on schedule stays thick instead of going to seed. There is nothing fancy about a straight edge along a sidewalk; it just makes the whole block look better.