Cottage garden in a backyard

A cottage garden traditionally fills its plot. Paths thread between borders and there is no open ground, because the original version was a productive garden with no ball games in it.

A family backyard cannot be laid out that way. What works is the inversion: everything pushed hard to the boundary in a border deep enough to layer properly, one open rectangle of grass in the middle, and no beds stranded where a bike will cut the corner.

That gives 1.2 to 1.5 metres of depth on three sides, which is enough for the back-middle-front layering the style depends on, while the lawn stays a single mowable shape. Island beds — the standard cottage move — are the first thing to lose here. Each one is an obstacle with a soft edge.

Everything that goes wrong happens in the last 300 millimetres of the bed.

Catmint and lady's mantle are meant to flop onto a path. Flopped onto turf they kill a strip of grass by midsummer, and the mower then scalps whatever is left. A ball landing in the border snaps delphinium and foxglove at the base. A dog running the fence line will find a route through the planting rather than around it.

The fix is physical rather than horticultural: a mowing strip the width of a mower wheel, in brick or gravel, between lawn and bed, so the flopping happens over stone. A low timber board does the same job and holds the mulch in. If a dog patrols, give it a deliberate 450 millimetre gravel run behind the border instead of letting it make one through the middle.

One thing about this pairing genuinely works in your favour, and it is the timing.

A cottage border peaks between June and August, which is the same window the yard is occupied. The barbecue, the paddling pool and the delphiniums arrive together, and nobody is examining the border closely in February. A front garden gets no such allowance; it is judged in every month.

The trade comes at the other end of the year. From November the border is cut stems and bare soil, and a backyard is the view from the kitchen window all winter. Two cheap answers: leave the seedheads standing until late February rather than tidying in October, and put three or four evergreen shapes — a clipped dome, a sarcococca, a group of hellebores — where the winter sightline lands.

Nothing in a nursery tells you what three layers of planting look like against your own fence, and this is the style where a render is both most useful and most flattering, because it draws year three.

AI Landscape Design, from Skyble Lab, works from a photograph of the yard, so the fence panels, the shed and the lawn shape come back unchanged while the borders fill in. Shoot from the back door and again from the far corner.

Read the output as a mood and a colour range rather than a planting plan. It will not name a cultivar for your zone, does not know the soil is heavy clay, and cannot see that half the border sits in the house's shadow until three in the afternoon. Compare it with the style at full depth, then download AI Landscape Design.