How to Plan a Raised Bed Vegetable Garden Layout

You’ve bought the raised bed kits, filled them with compost, and now you’re staring at an empty grid of soil wondering where everything goes. Tomatoes next to beans? Lettuce at the edge or the centre? How close is too close? Planning a raised bed layout isn’t just about fitting plants in — it’s about giving each crop the space, light, and companions it needs to actually produce food rather than a tangled mess by July.

In This Article

• Why Layout Planning Matters
• Choosing Your Bed Size and Orientation
• The Basics of Plant Spacing
• Square Foot Gardening Method
• Row Planting vs Block Planting
• Tall Plants and Shade Management
• Companion Planting in Raised Beds
• Seasonal Succession Planting
• Sample Layouts for Common Bed Sizes
• Common Layout Mistakes
• Frequently Asked Questions

Why Layout Planning Matters

Maximising Yield per Square Metre

A well-planned 1.2m × 2.4m raised bed can produce 10-15kg of mixed vegetables per season. A badly planned one — same bed, same soil, same effort — might produce half that. The difference is spacing, light access, and timing.

Avoiding Mid-Season Chaos

Without a plan, raised beds turn into survival-of-the-fittest by midsummer. Courgettes smother lettuce. Tomatoes shade out carrots. Runner beans collapse onto neighbouring plants. A layout drawn on paper in March prevents the August regret of “why did I plant this here?”

Making Crop Rotation Easier

If you know where everything grew this year, you can rotate families next year — preventing soil-borne disease buildup. Random planting makes rotation impossible because you can’t remember what went where. Our crop rotation guide explains the four-year system that works perfectly with raised bed layouts.

Choosing Your Bed Size and Orientation

Width: 1.2m Maximum

The golden rule of raised beds: you must be able to reach the centre from either side without stepping in. For most adults, that’s a maximum width of 1.2m (4ft). If the bed sits against a wall or fence, reduce to 60-80cm (you can only reach from one side).

Length: Whatever Fits

Length doesn’t matter functionally — 1.8m, 2.4m, 3.6m, whatever your space allows. Longer beds give more planting area per metre of edging material, so they’re more cost-efficient.

Orientation: North-South

Orient beds so the long axis runs north-south. This ensures:

• Even sun distribution — as the sun tracks east to west, both sides of the bed get equal light
• No permanent shade — if beds run east-west, the north side gets shaded by taller plants on the south side

This matters less for beds under 1.2m wide, but becomes significant for wider or deeper beds. The RHS kitchen garden planning guidance recommends north-south orientation for maximum productivity.

Path Width Between Beds

Leave 45-60cm between beds — enough to kneel comfortably, wheel a barrow through, and access both sides without compacting the bed edges. Going narrower saves space but makes harvesting genuinely frustrating by late summer when plants spill over the edges.

The Basics of Plant Spacing

Why Spacing Matters More in Raised Beds

Raised beds use premium compost and are designed for intensive planting — closer spacing than ground-level rows. But “closer” doesn’t mean “crammed in.” Each plant still needs:

• Root space — roots compete for water and nutrients
• Air circulation — tight planting increases fungal disease risk
• Light access — shaded leaves don’t photosynthesise efficiently
• Harvest access — you need to reach the produce

General UK Spacing Guide for Raised Beds

• Lettuce/salad leaves: 15-20cm apart
• Carrots: 5-8cm apart in rows 15cm apart
• Beetroot: 10cm apart in rows 20cm apart
• Radishes: 2-3cm apart in rows 10cm apart
• Courgettes: one per bed (they need 90cm × 90cm minimum — they’re enormous)
• Tomatoes: 45-60cm apart (plus support structure)
• Runner/French beans: 15-20cm apart with supports
• Peas: 5-8cm apart in double rows 15cm apart
• Onions/garlic: 10-15cm apart in rows 20cm apart
• Brassicas (cabbage, kale, broccoli): 45-60cm apart (larger than people expect)

The Seed Packet Problem

Seed packet spacing advice assumes traditional row planting in open ground with space between rows for hoeing. In raised beds, you can reduce between-row spacing by 20-30% because you don’t need access paths within the bed — you reach in from the edges. Within-row spacing stays the same.

Square Foot Gardening Method

What It Is

Developed by Mel Bartholomew, square foot gardening divides your bed into 30cm × 30cm (roughly 1ft × 1ft) squares. Each square gets a specific number of plants based on their mature size:

• 1 per square: tomato, pepper, aubergine, courgette (actually needs 4-9 squares), broccoli, cauliflower
• 4 per square: lettuce, Swiss chard, basil, parsley
• 9 per square: beetroot, turnip, onion, leek
• 16 per square: carrot, radish, spring onion

Why It Works for Beginners

Square foot gardening removes the guesswork. You don’t need to calculate spacing — just count squares. It naturally prevents overcrowding and makes crop rotation simple (rotate by square). I used this method for my first two years of raised bed growing and it produced consistently good results with minimal planning stress.

Limitations

• Inflexible for larger plants — courgettes and squash don’t fit neatly into squares
• Can feel artificial — experienced growers often prefer organic layouts that respond to actual plant growth
• Underestimates some spacings — brassicas and climbing beans need more room than one square

Row Planting vs Block Planting

Row Planting

Traditional approach: plants in single lines with walking space between rows.

• Works well for: crops you harvest individually over time (carrots, beetroot, lettuce)
• Advantage: easy to identify what’s growing, simple to thin, clean weed access
• Disadvantage: wastes space in raised beds (the “path” between rows isn’t needed)

Block Planting

Plants arranged in a grid pattern across the entire bed, equidistant in all directions.

• Works well for: root vegetables, salads, onions, garlic — anything that forms a uniform canopy
• Advantage: 15-30% more plants per bed, the leaf canopy shades the soil (suppressing weeds naturally)
• Disadvantage: harder to thin, harder to spot individual plants, can feel crowded

The Practical Answer

Use both. Block plant root vegetables and salads (they’re uniform and respond well to grid spacing). Row plant climbing or tall crops (beans, peas, tomatoes) along supports at the back of the bed. This hybrid approach maximises yield without sacrificing access or structure.

Tall Plants and Shade Management

The North-Side Rule

Place tall plants at the north end of your raised bed. In the UK, the sun sits in the southern sky — tall plants at the north cast their shadow northward, away from the rest of the bed. Tall plants at the south end shade everything behind them.

Height Categories

• Tall (1m+): runner beans, climbing French beans, sweetcorn, staking tomatoes, sunflowers
• Medium (30-60cm): bush tomatoes, peppers, kale, Swiss chard, broad beans
• Low (under 30cm): lettuce, radishes, carrots, beetroot, herbs, strawberries

Layered Planting

Arrange in tiers:

1. Back (north): tall climbers on supports (beans, peas)
2. Middle: medium-height plants (tomatoes, peppers, brassicas)
3. Front (south): low-growing crops (salads, roots, herbs)

This ensures every plant gets direct sunlight for at least part of the day — critical for fruiting crops like tomatoes that need 6+ hours of direct sun.

Companion Planting in Raised Beds

Companion planting works especially well in raised beds because plants are closer together, so the benefits (and risks) of neighbours are amplified.

Good Companions

• Tomatoes + basil — basil may repel whitefly and improves tomato flavour (anecdotal but persistent)
• Carrots + spring onions — the onion scent masks carrots from carrot fly
• Lettuce + radishes — radishes mature fast and are harvested before lettuce needs the space
• Beans + sweetcorn — beans fix nitrogen that sweetcorn is heavy on
• Marigolds (calendula) + everything — attract pollinators and repel certain pests. Plant at bed edges

Bad Companions

• Tomatoes + brassicas — compete for the same nutrients
• Beans + onions/garlic — onion family inhibits bean growth
• Fennel + nearly everything — fennel is allelopathic (chemically inhibits neighbouring plants)

For a complete pairing reference, our companion planting guide covers every common UK vegetable combination.

Seasonal Succession Planting

What It Is

Succession planting means replacing harvested crops with new plantings throughout the season — so your bed is never empty. A bed that only produces one crop from April to September is wasting half its potential.

Spring → Summer → Autumn Timeline

March-April (early): sow peas, broad beans, radishes, lettuce, spinach, spring onions

May-June (early crops finish): as early lettuce and radishes are harvested, replant with:

• French beans (direct sow May)
• Courgette seedlings (plant out after last frost, late May)
• More lettuce (cut-and-come-again varieties grow in 4-6 weeks)

July-August (midsummer gaps): as peas and broad beans finish, sow:

• Autumn lettuce and rocket
• Spring cabbage (for overwintering)
• Beetroot (fast-maturing varieties like Boltardy)

September-October: as summer crops end, plant:

• Garlic (cloves go in October-November for next year)
• Overwintering onion sets
• Green manure (phacelia, field beans) to protect and enrich soil over winter

The 3-4 Crop Rule

A well-planned raised bed should produce 3-4 different crops per year from the same soil. This maximises your return on the compost investment and keeps the bed productive from March to November. Knowing which vegetables succeed for beginners helps here — our beginner vegetable guide covers the most reliable UK crops.

Sample Layouts for Common Bed Sizes

1.2m × 1.2m (Small Square Bed)

Option A — Salad Bed:

• 4 lettuce (corners, 30cm from each edge)
• 9 radishes (centre block)
• 4 spring onions (between lettuce)
• Basil and parsley around edges

Option B — Tomato Bed:

• 1 staking tomato (centre, with support)
• 4 basil plants (surrounding)
• Edge: lettuce or low herbs

1.2m × 2.4m (Standard UK Raised Bed)

Mixed Vegetable Layout:

• North end: runner bean wigwam (60cm × 60cm area)
• Centre-north: 2 tomato plants (45cm apart, with canes)
• Centre: 2 rows of carrots (block planted, 15cm spacing)
• Centre-south: 1 row beetroot (10cm spacing)
• South end: 2 rows lettuce (cut-and-come-again, 15cm spacing)
• Edges: marigolds at corners, herbs (chives, parsley) along one side

This produces salads (lettuce, radishes), roots (carrots, beetroot), fruiting crops (tomatoes), and climbing crops (beans) from a single 2.9m² bed.

1.2m × 3.6m (Large Bed)

Treat as three 1.2m × 1.2m zones:

• Zone 1 (north): climbing beans + sweetcorn (the “Three Sisters” area)
• Zone 2 (middle): root vegetables — carrots, beetroot, parsnips in block planting
• Zone 3 (south): salads, herbs, and fast-turnaround succession crops

Common Layout Mistakes

Underestimating Courgette Size

One courgette plant needs 90cm × 90cm minimum. In a 1.2m × 2.4m bed, a single courgette takes up a third of the space and shades everything within reach. Unless courgettes are your primary goal, grow them in the ground or in their own large pot instead.

Planting Tall Crops on the South Side

Tomatoes, beans, or sweetcorn at the south end of the bed shade everything behind them. Always place tall plants at the north end so their shadow falls away from the bed, not across it.

Ignoring Succession Planting

A bed planted entirely in April and harvested entirely in August sits empty for 7 months of the year. Plan 3-4 sowings across the season. As one crop finishes, the next goes in. This is where the real productivity gains live.

Overcrowding Brassicas

Broccoli, cauliflower, and cabbage need far more space than most beginners expect — 45-60cm between plants. Three broccoli plants fill a 1.2m × 1.2m bed. If you’re growing brassicas, dedicate a full bed to them rather than squeezing them between other crops.

Forgetting Access

Every plant in the bed must be reachable from the edge without stepping on the soil. In practice, this means nothing should be planted more than 60cm from the nearest path. For beds against walls, nothing more than 60cm from the accessible side.

Frequently Asked Questions

How many vegetables can I grow in one raised bed? A standard 1.2m × 2.4m bed comfortably holds 4-6 different vegetables if you plan spacing and heights carefully. With succession planting (replacing harvested crops), the same bed can produce 8-12 different crops across a full growing season from March to November.

Should I draw my raised bed layout on paper? It’s the single most useful thing you can do before planting. Use graph paper (1 square = 10cm), mark the bed dimensions, and place crops at their correct spacings. This takes 15 minutes and prevents months of overcrowding, shade problems, and wasted space. Keep the plan for crop rotation reference next year.

How deep should a raised bed be for vegetables? Minimum 15cm for salads and shallow roots. 20-30cm for most vegetables including carrots, beetroot, and tomatoes. Deeper than 30cm gives diminishing returns unless you’re growing long root vegetables like parsnips. According to the RHS vegetable growing guidance, most crops thrive in 20-25cm of quality compost above existing soil.

Can I mix flowers and vegetables in a raised bed? Yes — and you should. Marigolds (calendula) attract pollinators and may deter pests. Nasturtiums act as trap crops for aphids. Borage attracts bees. Plant flowers at bed edges where they won’t compete with vegetables for space but still provide their benefits.

When should I plan my raised bed layout? January-February is ideal — before you order seeds or buy plants. Planning in winter gives you time to research spacings, order specific varieties, and draw layouts without the time pressure of spring planting season. By March, you should know exactly what goes where.