In a shaded, damp garden a moss lawn is soft underfoot, green through winter and drought, and free of mowing, feeding and watering once established. Where grass struggles, it is often the better surface, not the consolation prize.
Is your site right?
Moss lawns want shade or part shade, reliable moisture, and acidic, firm, low-nutrient ground. A spot that bakes in afternoon sun is the wrong place; a cool, damp, north-facing or tree-shaded area is ideal. If grass already sulks there and moss is creeping in on its own, the site is telling you what it wants.
Prepare the ground
Strip off the existing grass and weeds, level the surface, then firm it down; moss likes contact with compacted ground, not fluffy tilth. Do not add compost or feed. On limey soils a light dressing of something acidic helps tip the balance in moss's favour.
Plant it
Either press fresh patches of moss firmly onto the prepared surface, butted tight together, or blend moss into a slurry with water or buttermilk and spread it over the area. Carpet-forming species such as the springy turf-mosses and feather mosses knit into a lawn faster than cushion types.
Establish and keep it
Mist daily for the first three or four weeks, ideally with rainwater, while the moss grips. After that, rainfall and shade do most of the work. The only routine job is clearing fallen leaves in autumn so the moss is not smothered. Walk on it lightly while young; once thick it takes gentle use. It improves every year.
What to expect, year by year
Temper your expectations on timing and a moss lawn is a delight; expect an instant carpet and you will be disappointed. In the first few months the patches or slurry green up and begin to spread, looking patchy and unconvincing while they do. Across the first full year they knit together into more or less continuous cover. By the second and third years the lawn has thickened into the deep, even, springy surface people picture, and from then on it simply improves, deepening and filling as the seasons pass. The slow start is the price of a surface that then needs almost nothing.
Honest comparison with grass
A moss lawn is not a like-for-like swap for turf, and it helps to know the trade in advance. Against grass it wins on shade tolerance, winter colour, drought resilience and upkeep, no mowing, no feeding, little watering. It loses on hard wear: it will not take football, a running dog or daily heavy footfall the way a sports lawn does, though it copes with normal garden use and stepping stones. So the honest summary is that moss suits a shaded, gently used garden beautifully and a sunny, child-and-ball-battered one poorly. Choose it for the right spot and it outperforms grass; force it into the wrong one and it struggles.