Potting Shed Installation & Setup: From Base to Bench

Siting: chase the morning light

The classic advice is to face the glazing due south, and for a greenhouse that's fair. For a potting shed we'd nudge you east or south-east: morning light warms the bench for the hours you're actually at it and wakes trays gently, without cooking the place by early afternoon the way a full-south wall of glass can in June. South still works — just expect to shade and water more in high summer. North-facing glazing is the last resort: fine for potting up, dim for seedlings.

Before you commit: a potting shed drinks water, so site it where a downpipe can feed a water butt, on the same side as the door you'll use. And stay clear of overhanging trees — drips streak the glass, leaves choke the gutter, shade defeats the windows.

The base: level matters more here

Every shed wants a flat, level base; a part-glazed building insists on one. Timber framing tolerates a slightly proud corner with nothing worse than a sticky door — glass won't. A frame sitting in a twist puts panes under stress, and the long sightline of a glazed wall shows every millimetre the base is out.

It's the same job done carefully: concrete, slabs or a pressure-treated timber base, flat and level to within 10mm. Our base preparation guide covers the ground-up method, the shed base guide compares the options, and the timber base installation guide walks it through peg by peg.

The setup half: a bench that runs like a workshop

Here's where a potting shed earns its keep. The difference between a building you sow in and one you shuffle around in is a single morning of deliberate setup.

Start with the bench, under the glazing, at a height you can work without stooping. Then arrange everything around one flow: compost on one side of you, the work in front, finished trays on the other. Compost lives in a lidded bin at bench-end — scoop, don't lug bags. Pots stack by size within reach; sown trays go straight onto staging in the light without taking a step. Tools keep to the solid side: long handles on hooks, hand tools on a rail, floor left clear. Speccing from scratch? Sketch the bench wall first and let the rest follow — the order we'd use in the Build Studio.

Air moves, seedlings live

Still, damp air is the quiet killer in any glazed building. Damping off — the fungal collapse of new seedlings — thrives where moisture sits, and a shut potting shed in a mild, wet week is exactly that. The cure costs nothing: open the window or door for a spell most days, even in winter — late morning, once any frost has lifted. Water in the morning so everything dries by evening, water compost rather than leaves, and give trays room on the staging. A part-glazed building is easier to keep aired than a greenhouse, but the habit is the same.

Overwintering, honestly

An unheated potting shed delays frost; it doesn't defeat it. The glazing gathers daytime warmth, the walls hold some of it, and most cold nights the inside stays a few degrees kinder than the open garden — enough to see borderline-hardy plants through an average winter and keep stored tubers dry. In a hard, prolonged freeze the cold gets in; it just arrives a night or two later.

So plan for what it is: pots off the floor, clustered on staging away from the glass, fleece over the tender ones when frost is forecast, and winter watering kept sparse — cold and wet kills more overwintered plants than cold alone. Anything genuinely tender wants heated glass or a windowsill indoors, not promises from an unheated building.