Start With the Plot You've Got

Before you spend a penny, spend an afternoon walking your patch with a notebook. Note where the sun sits at midday, where the frost lingers in spring, and where water pools after heavy rain. A kitchen garden that works with the site costs far less than one that fights it. South-facing walls and fences are gold for tender crops, while a cold, shaded corner is perfect for brassicas and salad leaves that bolt in heat.

Measure up and plan beds no wider than 1.2 metres so you can reach the middle from either side without treading on the soil. Draw it on paper, mark the paths, and decide what you actually eat. There is no point devoting a third of your space to courgettes if the family turns their noses up at them. Grow what earns its keep — expensive-to-buy crops like salad leaves, herbs, soft fruit and climbing beans give the best return on a small budget.

Building Beds from Scrap and Salvage

Raised beds are lovely, but you do not need to buy timber. Pallets are the classic free material, and once dismantled with a crowbar and a bit of patience they yield usable slats. Look for the HT stamp, which means heat-treated — avoid anything marked MB, as that has been fumigated with methyl bromide and is not suitable for growing food.

Other cheap or free structures worth hunting down:

• Scaffold boards, often sold off cheaply by firms once they are past their working life
• Bricks, paving slabs and broken concrete for path edging and bed frames
• Old buckets, trugs, dustbins and builder's bags for container growing
• Car tyres for potatoes — though keep them out of full sun to avoid overheating
• Pallet collars, which stack neatly into instant raised beds with no dismantling at all

Line the bottom of new beds with cardboard from delivery boxes, soaked well and overlapped. It smothers weeds for a season and then feeds the worms as it rots down. No dig, no backache, no herbicide.

Feed the Soil Without Spending a Fortune

Healthy soil grows healthy plants, and it is the one thing you can improve for nothing but effort. Start a compost heap in a pallet bay — three bays if you have room, so you can turn and mature in rotation. Balance greens (grass clippings, kitchen scraps, young weeds) with browns (cardboard, straw, dead leaves, shredded paper). Aim for roughly equal volumes and turn it occasionally.

Leaf mould is the gardener's best-kept freebie. Bag up autumn leaves in bin liners punched with holes, leave them behind the shed for a year or two, and you have a superb seed-sowing compost and soil conditioner. Wormeries turn kitchen waste into rich castings for potting on. And a patch of comfrey or stinging nettles, steeped in a bucket of water for a fortnight, makes a potent liquid feed. Fair warning: it smells dreadful, so keep it well away from the back door.

Seeds: Buy Once, Swap Often, Save Forever

Seed is where budgets quietly leak. A few packets here and there adds up fast, so treat your first year as an investment and every year after as a dividend.

• Buy open-pollinated and heritage varieties rather than F1 hybrids, because their seed will come true next year
• Split packets with neighbours — most contain far more seed than one garden needs
• Check the seed swap table at your local allotment association, village hall or gardening club in late winter
• Join a community seed library if there is one nearby, and give back at harvest

The easiest crops to save from are beans, peas, tomatoes, lettuce and chillies. Let a few of your strongest plants run to seed, collect on a dry day, label clearly with the variety and year, and store in paper envelopes in a cool, dark tin. Do not save from parsnips, carrots or brassicas unless you are confident about isolation distances, as they cross-pollinate readily and the results can be disappointing.

Free Plants and the Gentle Art of Swapping

Many of the best garden plants multiply all by themselves. Strawberries throw out runners, rhubarb and chives can be lifted and divided in autumn or early spring, and mint, thyme and sage root readily from cuttings. A single purchased herb plant can become a dozen within two seasons.

Surplus is the currency of rural living. Those twelve extra tomato seedlings on your windowsill are worth more to a neighbour than the fifty pence you would get at a car boot sale. Swap them for seed, manure, a few hours of digging help, or a jar of something from someone else's kitchen. Set up a tables-by-the-gate honesty box in late spring and you will find the goodwill comes back around. Keep a note of who gave you what, so you can return the favour with something they actually want.

Water, Mulch and Tools on the Cheap

Water butts connected to shed and greenhouse downpipes pay for themselves within a dry summer. If new ones seem pricey, look for second-hand barrels, old dustbins, or even a lined builder's bag under a downpipe.

Mulching is the cheapest water-saving trick there is. A thick layer of grass clippings, straw, compost or shredded bark suppresses weeds, keeps moisture in and slowly feeds the soil. Apply it after rain, when the ground is already damp.

Tools are worth buying once and looking after properly. Car boot sales, farm sales and auction marts are full of sturdy old spades and forks that will outlast anything new and flimsy. Keep an edge on your hoe, oil the handles, and store everything dry. A well-kept second-hand spade will serve you for thirty years, and there is something quietly satisfying about that.