A potting shed is one of the great small pleasures of a garden. It is part workshop, part storeroom and part retreat, and by late winter it tends to be a jumble of half-empty compost bags, tangled twine and tools that have lost their homes. With spring sowing just around the corner, a few hours spent putting things in order will pay you back all season. The trick is not to buy a shed-load of new storage, but to work out what you actually use, how often, and where it needs to live.

Start with an honest clear-out

Take everything out. Yes, all of it, even the boxes you have not opened since last spring. Sweep the floor, wipe down the bench and check the roof and walls for damp patches or gaps where mice can slip in. While the shed is empty, you can see what space you really have to work with.

As you sort, make three piles: keep, repair and let go. Rusted tools can often be rescued with wire wool and oil, but cracked plastic pots, split bags of compost that have turned to sludge and seed packets from three years ago are best consigned to the bin or the council green waste. Be strict. A shed that only holds things you genuinely use is a shed that stays tidy.

Shelving that suits a working shed

Wall-mounted shelving is the backbone of a good potting shed. Aim for shelves around 30cm deep, which is wide enough for seed trays and folded fleece but not so deep that things vanish at the back. Fix the top shelf at eye level and work down, leaving a generous gap above the bench so you can stand a full seed tray upright without knocking it.

• Use adjustable brackets so you can change the spacing as your storage needs shift.
• Keep heavy items such as compost and grit on the lowest shelf or the floor, never overhead.
• Add a lip or a strip of timber to the front edge of high shelves to stop pots sliding off.
• Line shelves with offcuts of pond liner or plastic sheeting to protect the wood from drips.

A shallow shelf above the window is ideal for small, light items, and a sturdy shelf under the bench gives you somewhere to tuck trugs and trays out of the way.

Hooks, rails and vertical thinking

The walls are your most underused asset. A simple rail with a row of S-hooks will hold secateurs, hand forks, trowels and dibbers within easy reach. Heavier tools such as spades and forks can hang from individual galvanised hooks, handles down and blades away from your head. Hang them so the blades face the wall, both for safety and to keep the edges from knocking together.

Beyond tools, think about everything that dangles. A hook by the door for your apron, another for the watering can, and a peg for the trug so it dries instead of festering in a corner. A small bucket or tin fixed to the wall makes a fine home for twine and scissors, and a magnetic strip is excellent for snips, scissors and the small bits and pieces that always go missing.

Seeds, labels and the paperwork of spring

Seed packets are the heart of spring planning and the easiest thing to lose. A lidded tin or a pair of stacking boxes, sorted by sowing month or by vegetable and flower, keeps them dark and dry. Tuck a small sachet of silica gel in each box to soak up moisture, and add a handful of dried rice if you have nothing else to hand.

• Store seeds somewhere cool and dark, well away from the shed's warm window.
• Keep a jar of wooden or plastic labels on the bench, along with a pencil and a waterproof marker.
• Use one small box for plant ties, clips and netting so they stop giving up on you mid-task.
• Hang a clipboard on a nail for your sowing notes, planting plan and a running shopping list.

A quick label written at sowing time saves a great deal of squinting at anonymous seedlings in May.

Pots, compost and the messy business

Pots are the trickiest thing to tame because they multiply. Stack terracotta and plastic pots by size, either in columns on the floor or threaded onto a length of sturdy dowel or wire fixed horizontally to the wall. That way you can pull off one pot without sending the whole tower crashing to the floor.

Keep compost in a lidded bin with a scoop clipped to the side, so you can fill a tray without wrestling with a split bag. A lidded bin also keeps the contents dry and discourages mice. Beside it, a bucket of sharp sand mixed with a little oil is a traditional and genuinely effective way to keep hand tools clean and rust-free. Finish the messy corner with a dustpan and brush on a hook, and you will actually use them.

Finishing touches that keep it working

Small comforts make a potting shed somewhere you want to spend time. A stool or an upturned crate gives you a seat at the bench, a jam jar of soapy water saves a trip to the house, and a well-placed lamp means you can pot on into the evening. A thermometer and a cheap weatherproof clock on the wall help you judge frost and daylight.

The last step is the simplest: label everything. Write the name on the front of storage boxes and tins, not the lid, so you can see at a glance what you are reaching for. Then set a five-minute rule at the end of every potting session, tools back on their hooks and the bench wiped down.

Do that and your shed will greet you ready for spring, with clean tools, dry seed and empty pots waiting to be filled.