Creating a low-maintenance garden after building work

Start by reading what the builders left behind

Building work rarely leaves a garden in a neutral state. You are likely to be dealing with ground compacted by a digger or a delivery lorry, subsoil dragged up to the surface, scattered mortar and cement wash, and levels altered to suit the build rather than the planting. Across Edinburgh and the Lothians the subsoil is often heavy boulder clay, which compacts like concrete and drains slowly once machinery has passed over it. Add a wet winter and a few wheelbarrow tracks and you have ground that will defeat almost anything you put in it.

Before you order a single plant, walk the site after rain. Puddles that sit for more than a day tell you where drainage needs attention. Push a spade in at several points — if you cannot get the blade in with your foot, that area needs breaking up. Check where the damp-proof course sits too: finished levels should stay at least 150mm below it with a fall away from the wall. Sorting levels before you plant is far cheaper than dealing with damp later.

Rebuild the soil before you choose anything

Plants are only as good as the ground beneath them, so this stage is worth doing properly rather than rushing towards the planting. Where cement, mortar or plaster have been mixed, the lime content raises the pH and can leave shrubs yellowing and stunted for years. Scrape off contaminated material and replace it, or leach the area thoroughly with water over several weeks and retest before planting.

• Break up compacted ground to at least a spade's depth with a garden fork, working backwards so you don't re-compact what you have just loosened. Avoid rotovating wet clay, which smears and seals it further.
• Remove rubble, brick ends and buried plastic sheeting. These create pockets of drought and root barriers that show up two summers later.
• Spread 50–75mm of well-rotted organic matter over the surface and fork it in. On clay, add horticultural grit as well to open up the structure.
• If the subsoil is truly poor, build raised beds 300–400mm deep and fill them with a good topsoil blend. This is often the quickest route to a productive garden on a building site.

Do this in autumn if you can. A winter of worm activity and frost will do more for heavy Lothian clay than any amount of extra digging in spring.

Choose plants that suit the east coast, not the catalogue

Edinburgh and the Lothians sit in a rain shadow, with some areas seeing under 700mm a year, drying east winds, late frosts and salt-laden air near the Forth. That combination is tough on tender plants but ideal for anything Mediterranean or coastal in origin, provided drainage is good. The temptation to plant thirsty, lush specimens is best resisted — they will need constant watering for years.

• Structure: lavender, rosemary, santolina, hardy hebes and euonymus clipped into low shapes.
• Grasses: stipa, miscanthus and deschampsia, which move in the wind and need only an annual cut back.
• Ground cover: hardy geraniums, alchemilla, sedum and bergenia to smother weeds and reduce watering.
• Shade and shelter: ferns, hellebores and epimedium under trees or along north-facing walls.
• Small trees: rowan, birch and amelanchier, all happy in clay and offering autumn colour.

Group plants by their water needs so you can irrigate one bed heavily and leave another alone.

Irrigation that works with the weather

Hand watering a new garden through its first two summers is the single biggest reason people give up on a planting scheme. Fit leaky-pipe or drip irrigation on a timer before the beds are mulched, with separate zones for borders, pots and any vegetable area. Connect it to water butts where you can, and add a tap timer so a week away does not undo a season's work.

Mulching is the cheapest irrigation there is. A 50–75mm layer of bark chip or composted green waste over damp soil in spring will cut evaporation dramatically, but keep it clear of stems and crowns to avoid rot. Remember that Scottish Water can impose hosepipe restrictions in a dry spell, so drought-tolerant planting and stored rainwater are sensible insurance.

Finish with hard landscaping that earns its keep

Paths, patios and boundaries determine how much maintenance the garden demands. Permeable paving, resin-bound gravel or a simple gravel path over a compacted base deal with rain where it falls and reduce runoff onto neighbours. If the build has left a low corner that floods, a shallow rain garden planted with moisture-loving species will absorb far more than a drain. Where water collects against the house, a French drain or gravel-filled channel leading to a soakaway is usually the answer, though always check local guidance before discharging into a surface water system.

For lawns, seed with a hardwearing mix rather than laying turf straight onto subsoil — it rarely takes. Or accept that a small lawn plus generous borders and gravel margins will look after itself far better.

Keep it low-maintenance from year one

A garden that looks after itself is designed, not discovered. Once established, most of the work falls into a predictable rhythm: mulch beds in spring, cut back grasses and perennials in late winter, prune shrubs after flowering, and check drip lines and filters each April before the growing season starts. Weed little and often in the first two years, while plants are filling out, and the borders will close over and shut out most of the competition.

Take photographs of the garden at the end of each season. They are the best record of what is thriving, what is struggling and where the next improvement should go.