Allotment Planting Guide UK — What to Grow & When (2026) | GardenCalc

Allotment Planting Guide UK

Everything you need to plan your allotment — from your first year to an experienced grower's calendar. What to grow, when to sow, and how to get the most from your plot.

Getting an Allotment in the UK

There are approximately 330,000 allotment plots in England alone, managed by around 6,000 allotment associations and local councils. Demand has never been higher — according to the National Society of Allotment and Leisure Gardeners (NSALG), an estimated 78,827 people are currently on waiting lists across the country. In some urban areas, the wait can stretch to 10 years or more.

A standard full-size allotment plot is 10 rods — approximately 250 square metres, which is roughly 25 metres long by 10 metres wide. This is traditionally the amount of land needed to feed a family of four for a year. If that sounds daunting, most councils now offer half plots of around 125 square metres, which are far more manageable, especially for beginners.

The cost is remarkably affordable. The average annual rent for a full allotment plot ranges from £25 to £70 per year, depending on your local council and the facilities provided. Some sites include water supply and communal tool sheds in the price; others charge a small supplement. Concessions are widely available for pensioners, students, and people receiving benefits — typically a 50% discount.

To get on a waiting list, contact your local council’s parks or allotments department. Some areas also have privately managed allotment associations where you apply directly to the site secretary. It is worth registering at multiple sites to increase your chances. When your name comes up, you will usually have a few weeks to accept and take over the plot.

Half Plot vs Full Plot

If you are offered a choice, start with a half plot. A full 250 sqm allotment requires a serious time commitment — at least 6 to 10 hours per week during the growing season. A half plot gives you 125 sqm of growing space, which is more than enough to produce a substantial amount of vegetables. Once you have the routines and confidence, you can always request an upgrade to a full plot or take on an adjacent vacant plot.

Most experienced allotment holders will tell you the same thing: it is far better to have a small, well-kept plot than a large, overgrown one. Neglected plots attract complaints from neighbours, and most councils will issue warnings and eventually reclaim plots that are not being cultivated.

Planning Your Allotment Layout

Before you plant a single seed, spend time planning your layout. A well-designed allotment is easier to manage, more productive, and far less work in the long run. The classic approach is to divide your plot into distinct areas for growing, composting, paths and storage.

The Four-Bed Rotation System

The most popular allotment layout is based on four main growing beds, each dedicated to a different crop group that rotates annually. Divide your main growing area into four roughly equal sections. If you have a full 250 sqm plot, each bed would be approximately 5m x 8m — but you can adapt the dimensions to suit your space.

Leave paths at least 45cm wide between beds so you can walk comfortably with a wheelbarrow. Many allotment holders use woodchip or bark chippings for paths — it suppresses weeds and stays tidy. Permanent raised beds are another popular option, particularly on sites with poor or waterlogged soil. If you are building raised beds, use our raised bed soil calculator to work out exactly how much soil and compost you need to fill them.

Other Areas to Plan

If you are starting with a half plot, simply halve the bed dimensions. Two larger beds with a simple two-year rotation is a perfectly workable starting plan that you can refine as you gain experience. Use our raised bed calculator to plan the soil volumes for any custom bed sizes you design.

First Year on an Allotment — What to Plant

Your first year on an allotment is about getting established, not about producing a prize-winning harvest. The single most common mistake new allotment holders make is trying to grow everything at once. Resist the temptation. Focus on a handful of reliable, easy crops and build from there.

Potatoes — The Plot Opener

Potatoes are the best first crop for a new allotment. They serve a dual purpose: they produce a satisfying harvest of food, and their dense foliage smothers weeds while their root system breaks up compacted soil. If your plot has been neglected, dedicate at least a quarter of it to potatoes in year one. Plant first earlies in March and maincrop varieties in April. By summer, you will be digging up your own new potatoes — and the ground they leave behind will be in vastly better condition for the next crop.

The Beginner’s Five

Alongside potatoes, these five crops are virtually foolproof for first-year growers:

  1. Courgettes — One or two plants will produce more courgettes than you can eat. Sow indoors in April, plant out after the last frost in May. Each plant needs about 1 square metre of space.
  2. Runner beans — Sow directly outdoors in May, provide a simple cane wigwam for support, and harvest from July to October. A 2-metre row can yield 25kg of beans.
  3. Lettuce and salad leaves — Sow in short rows every 2–3 weeks from March to August for a continuous supply. Ready to pick in 4–6 weeks. Use our planting calendar for exact timing.
  4. Radishes — The fastest vegetable you can grow. Sow to harvest in just 4 weeks. Perfect for filling gaps between slower crops.
  5. Onions (from sets) — Push sets into the ground in March or April. Almost zero maintenance. Harvest in July or August and they store for months.

These crops give you quick wins, build your confidence, and teach you the fundamentals of sowing, watering, feeding and harvesting — all without requiring specialist equipment or advanced knowledge.

What to Do with the Rest of the Plot

If you are not ready to cultivate your entire plot in year one, do not leave it bare — weeds will colonise it within weeks. Cover unused areas with cardboard weighted down with bricks, old carpet (check your site rules — some ban carpet), or a thick layer of woodchip mulch. This suppresses weeds and starts improving the soil underneath. By year two, you can peel back the covering and plant straight into cleaner, softer ground. Check our mulch calculator to work out how much woodchip you need for a given area.

Allotment Planting Calendar — Month by Month

This is your year-round reference table for allotment growing in the UK. Timings are based on average conditions in central England — adjust by 1–3 weeks if you garden in Scotland, northern England, or sheltered southern areas. For more detailed monthly advice, visit our interactive planting calendar.

Month Sow Indoors Sow Outdoors Plant Out Harvest
January Onions, leeks, chillies, early tomatoes (heated propagator) Garlic cloves, rhubarb crowns Leeks, parsnips, Brussels sprouts, winter cabbage, kale
February Peppers, aubergines, tomatoes, lettuce, broad beans Broad beans (mild areas), parsnips (late Feb) Onion sets, shallots, garlic (if not done in autumn) Purple sprouting broccoli, leeks, chard, forced rhubarb
March Tomatoes, peppers, cucumbers, broccoli, cauliflower, leeks Broad beans, peas, parsnips, carrots (under cloches), lettuce, radishes, spinach First early potatoes (late March, south), onion sets, shallots Purple sprouting broccoli, leeks, spring cabbage, forced rhubarb
April Courgettes, squash, sweetcorn, French beans, basil Beetroot, carrots, peas, lettuce, spring onions, turnips, chard, rocket Maincrop potatoes, onion sets, asparagus crowns Asparagus, radishes, spring onions, rhubarb, spinach
May Pumpkins, winter squash (early May only) Runner beans, French beans, sweetcorn, beetroot, carrots, courgettes, squash Tomatoes (after last frost), courgettes, cucumbers, peppers, sweetcorn, squash Asparagus, radishes, lettuce, broad beans (late May), new potatoes
June French beans (succession), beetroot, carrots, lettuce, spring onions, turnips Leeks, brassicas (Brussels sprouts, cabbage, kale), runner beans Broad beans, peas, new potatoes, strawberries, lettuce, radishes, gooseberries
July Spring cabbage, turnips, beetroot (late sowing), lettuce, radishes Leeks, purple sprouting broccoli, winter cabbage Runner beans, French beans, courgettes, potatoes, tomatoes, raspberries, blackcurrants
August Spring cabbage, winter lettuce, spinach, rocket, radishes Strawberry runners Tomatoes, courgettes, runner beans, sweetcorn, onions, beetroot, plums, blackberries
September Overwintering onion sets, garlic, green manures (field beans, phacelia) Spring cabbage plants, overwintering onion sets Sweetcorn, squash, pumpkins, apples, pears, runner beans, tomatoes (last), main potatoes
October Broad beans (overwintering), garlic, green manures Garlic cloves, rhubarb crowns, bare-root fruit trees & bushes Squash, pumpkins, carrots, beetroot, leeks, apples, pears
November Broad beans (mild areas), garlic Bare-root fruit trees & bushes, rhubarb, raspberry canes Leeks, parsnips, Brussels sprouts, winter cabbage, swede, celeriac
December Bare-root fruit trees (dormant season), garlic cloves Leeks, parsnips, Brussels sprouts, kale, winter cabbage, stored squash

For detailed sowing instructions month by month, see our individual guides: March, April and May. More monthly guides are available from our planting calendar page.

Best Vegetables for Allotments — Ranked by Value

Not all vegetables are equal when it comes to allotment growing. Some give you enormous yields from a tiny space; others take up half your plot for a handful of roots. This table ranks 15 popular allotment vegetables by their overall value — factoring in yield, effort, cost savings and how suitable they are for beginners.

Vegetable Yield per m² Effort Level Cost Saving (£/year) Beginner Friendly?
Potatoes 4–5 kg Low £50–80 Yes
Courgettes 15–20 kg (per plant) Low £30–50 Yes
Runner Beans 10–12 kg (per 2m row) Low £40–60 Yes
Tomatoes 5–8 kg (per plant) Medium £40–70 Yes (indoors start)
Onions 3–4 kg Very low £20–35 Yes
Garlic 1–2 kg Very low £25–40 Yes
Beetroot 3–5 kg Low £15–25 Yes
Chard 3–4 kg Low £20–35 Yes
Raspberries 2–4 kg (per row metre) Low (once established) £50–80 Yes
Lettuce & Salads 2–3 kg Low £30–50 Yes
Peas 1–2 kg Low £15–25 Yes
Broad Beans 2–3 kg Low £15–25 Yes
Sweetcorn 1–2 cobs per plant Medium £10–20 Yes
Carrots 3–4 kg Medium £10–15 Moderate (carrot fly)
Parsnips 2–3 kg Medium £10–15 Moderate (slow germination)

The clear winners for new allotment holders are potatoes, courgettes, runner beans and onions. They give you the highest yield for the least effort and the best savings compared to supermarket prices. Raspberries are a long-term investment — they take a year to establish but then produce prolifically for 10–15 years with minimal care.

Crops like carrots and parsnips are still worth growing — the taste of a freshly pulled, home-grown carrot is incomparably better than anything from a shop — but they require more attention to pest management and soil preparation.

Crop Rotation for Allotments

Crop rotation is the practice of growing different families of vegetables in different beds each year, following a set cycle. It is one of the most important principles in allotment gardening and the main reason experienced growers divide their plots into distinct beds.

The standard allotment rotation is a four-year cycle. Each year, every crop group moves one bed clockwise (or in whichever direction you choose — the key is consistency).

Bed 1 — Legumes

Peas, broad beans, runner beans, French beans. Legumes fix nitrogen in the soil, enriching it for the next group.

Bed 2 — Brassicas

Cabbage, broccoli, cauliflower, kale, Brussels sprouts, turnips, swede. These are hungry feeders that benefit from the nitrogen left by legumes.

Bed 3 — Roots

Carrots, parsnips, beetroot, celeriac. Root crops prefer lighter soil without recent manuring — fresh manure causes roots to fork.

Bed 4 — Alliums & Potatoes

Onions, garlic, leeks, shallots, potatoes. Potatoes break up the soil structure, leaving it in good condition for the legumes that follow.

Why Rotation Matters

Growing the same crop in the same soil year after year causes three problems. First, soil-borne diseases and pests build up — club root in brassicas, white rot in onions, and eelworm in potatoes all persist in the soil and worsen each year if the host crop is always present. Second, each crop family depletes specific nutrients — rotation allows the soil to recover naturally. Third, different root depths and structures improve soil health over the cycle: deep-rooted parsnips open up compacted subsoil, while shallow-rooted lettuce leaves the structure intact.

Even if you only have two beds, a simple alternation between “roots and alliums” and “everything else” is vastly better than no rotation at all. To understand what your soil needs, our fertiliser calculator can help you work out the right quantities of feed for each crop group.

Soil Preparation for Allotments

Good soil is the foundation of a productive allotment. Whether you are taking on a neglected plot for the first time or improving established beds, investing time in your soil pays dividends for years.

Assessing Your Soil

Start by understanding what you are working with. Pick up a handful of moist soil and squeeze it. If it forms a sticky ball that holds its shape, you have clay soil. If it crumbles and falls apart, you have sandy soil. If it holds together loosely and feels slightly gritty but also smooth, you likely have loam — the ideal. Most allotments in the UK sit on clay or clay-loam, which is fertile but heavy and slow to warm up in spring.

The solution for almost every soil type is the same: add organic matter. Compost, well-rotted farmyard manure, and leaf mould all improve drainage in heavy clay and moisture retention in sandy soil. A 5–10cm layer of compost worked into the top 20cm of soil will transform it within a single season. Use our compost calculator to work out exactly how much you need for your bed sizes.

The No-Dig Method

No-dig gardening is increasingly popular on allotments, and for good reason. Instead of turning the soil each year, you simply add a thick layer (5–10cm) of compost or well-rotted manure on top of the existing soil each autumn and let the worms do the work. The benefits are significant: less back-breaking labour, better soil structure, fewer weeds (undisturbed weed seeds stay dormant), and a thriving population of earthworms and beneficial fungi.

The pioneer of no-dig gardening in the UK, Charles Dowding, has demonstrated through decades of trials that no-dig beds produce yields equal to or better than traditionally dug beds. For a new allotment, you can start no-dig immediately: lay cardboard over grass or weeds, top with 15cm of compost, and plant straight into it. Our soil calculator will help you work out the volume of compost needed for any bed size.

Green Manures for Winter

Do not leave allotment beds bare over winter. Sow a green manure crop in September or October to protect the soil from erosion, suppress weeds, and fix nitrogen. The best green manures for allotments are:

Cut or dig in green manures at least 4 weeks before you want to sow or plant in that bed in spring. Use our soil calculator if you need to top up beds with extra compost after incorporating the green manure.

Water Management on Your Allotment

Water is the single biggest limiting factor on many UK allotments. Some sites have standpipes or a communal tank; others have no mains water supply at all. Even on sites with water, carrying watering cans back and forth across a 250 sqm plot is exhausting. Planning your water management from the start saves enormous amounts of time and effort.

Water Butts Are Essential

If your allotment has a shed, greenhouse, or any structure with a roof, fit water butts to collect rainwater. A single 200-litre water butt can be filled by just 5mm of rainfall on a small shed roof. Many experienced allotment holders have 3 or 4 water butts connected in series, giving them 600–800 litres of stored water — enough to get through most dry spells without relying on the communal supply.

Rainwater is also better for your plants than tap water. It is slightly acidic (most vegetables prefer a pH of 6.0–7.0), free of chlorine, and at ambient temperature rather than ice-cold from the mains. Use our water butt calculator to work out exactly how many litres of storage you need based on your roof area and local rainfall.

Mulching to Conserve Moisture

Mulching is the most effective way to reduce water loss from your allotment soil. A 5–8cm layer of organic mulch — straw, bark chippings, grass clippings, or compost — spread around your plants reduces evaporation by up to 70%. It also suppresses weeds (which compete for water) and gradually improves the soil as it breaks down.

Apply mulch in late spring after the soil has warmed up but before the summer dry spells hit. Do not mulch in winter or early spring — it keeps the soil cold and delays warming. For bark chippings and other bulk mulches, use our mulch calculator to get the quantity right.

Watering Tips for Allotments

If your site has no water supply at all, factor this into your crop choices. Potatoes, onions, garlic and most root vegetables need relatively little supplemental watering once established. Avoid water-hungry crops like celery and celeriac until you have reliable water infrastructure in place. Use our water butt calculator to plan your rainwater collection capacity.

Common Allotment Mistakes

Every allotment holder makes mistakes — it is part of learning. But these five are so common, and so easily avoided, that they are worth highlighting before you start.

1. Taking on Too Much in Year One

This is the number one reason people give up their allotment within the first year. A full 250 sqm plot is a serious commitment. It is far better to cultivate half your plot thoroughly than to scratch the surface of the whole thing and watch it descend into weeds by July. Start small. Cover the rest. Expand in year two when you know your routines and limits.

2. Not Visiting Often Enough

During the growing season (April to September), your allotment needs you at least twice a week. Weeds grow fast, crops need picking at the right time, and a dry spell can undo weeks of work in just a few days. If you can only manage one visit a week, focus on crops that tolerate neglect — potatoes, onions, garlic, squash — and avoid high-maintenance crops like tomatoes and sweet peppers. Consistency beats enthusiasm every time.

3. Ignoring the Weeds

Weeds are the allotment holder’s constant battle. The key rule is simple: never let weeds set seed. One year’s seeding means seven years’ weeding, as the old saying goes. Hoe little and often on dry days — 20 minutes of hoeing twice a week is far more effective than a 4-hour battle once a month. Cover bare soil with mulch, cardboard, or a green manure crop. Our mulch calculator will help you work out how much material you need to smother weeds on unused areas.

4. Planting Too Close Together

It is tempting to cram as many plants as possible into your beds, but overcrowding causes more problems than it solves. Plants compete for light, water and nutrients, leading to weaker growth and lower yields. Poor air circulation increases the risk of fungal diseases. Follow the spacing recommendations on seed packets — they exist for good reason. If you are short on space, grow climbing varieties (runner beans, climbing French beans, cucumbers up a trellis) to use vertical space instead.

5. Forgetting to Plan for Winter

Many allotment holders pack up in September and leave the plot empty until spring. This is a wasted opportunity. Overwintering crops like garlic, broad beans, and spring cabbage can go in during October and November, giving you an early harvest the following year. Sow green manures on empty beds to protect and improve the soil. Use winter to compost, plan your rotation, order seeds, and maintain paths and structures. The best allotments are productive all year round. Check our planting calendar for autumn and winter sowing dates, and our succession planting guide for continuous cropping strategies.

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Frequently Asked Questions

How much does an allotment cost in the UK?
The average cost of an allotment in the UK is between £25 and £70 per year, depending on your local council and plot size. Some councils charge as little as £15 for a half plot, while others charge up to £100 for a full 10-rod plot. Concessions are usually available for pensioners and people on low incomes. Water charges may be included or added separately.
What should I plant first on a new allotment?
Potatoes are the best first crop on a new allotment. They break up compacted soil, suppress weeds with their dense foliage, and are almost impossible to fail with. Plant them in your first spring and they will leave the ground in much better condition for the following year. Alongside potatoes, try courgettes, runner beans, lettuce and radishes — all easy, fast-growing and forgiving for beginners.
How big is a standard allotment plot?
A standard full-size allotment plot in the UK is 10 rods, which is approximately 250 square metres (roughly 25m x 10m). This is traditionally the area needed to feed a family of four for a year. Many councils now offer half plots of 125 square metres, which are more manageable for beginners and still provide a generous growing space.
What vegetables give the best yield per square metre?
The highest-yielding allotment vegetables per square metre are courgettes (up to 20kg per plant), runner beans (up to 25kg from a 2m row), and potatoes (4–5kg per square metre). Tomatoes, climbing French beans and chard also give excellent returns. In terms of cost savings, potatoes, onions and soft fruit like raspberries and strawberries save the most money compared to supermarket prices.
Can beginners manage a full allotment?
Most experienced allotment holders recommend beginners start with a half plot (125 square metres) rather than taking on a full 10-rod plot. A full plot is a significant commitment — it needs visiting at least twice a week during the growing season. Start with half, get it productive and under control, and then expand into the full plot in year two or three when you have the confidence and routines established.
How often should I visit my allotment?
During the main growing season (April to September), you should visit your allotment at least twice a week. In peak summer, three or four visits a week is ideal for watering, harvesting and keeping on top of weeds. In winter, once a week or fortnightly is usually enough for maintenance tasks like tidying, composting and planning. Many allotment tenancy agreements require you to keep your plot cultivated — neglected plots can be reclaimed by the council.
What is crop rotation and do I need it?
Crop rotation means growing different types of vegetables in different beds each year, following a set cycle — typically a four-year rotation. The four groups are legumes (peas, beans), brassicas (cabbage, broccoli, kale), roots (carrots, parsnips, beetroot) and alliums/potatoes (onions, garlic, potatoes). Rotation prevents soil-borne diseases building up, balances soil nutrients naturally, and breaks pest life cycles. Yes, you should practise it — even a simple three-bed rotation makes a noticeable difference.
When is the best time to start an allotment?
The ideal time to take on a new allotment is February or March, giving you the whole growing season ahead. However, any time of year works — autumn and winter are excellent for clearing, digging, adding compost, and planning your layout ready for spring. If you get your plot in summer, focus on fast crops like salads and radishes, then use autumn to prepare beds for the following year.

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