How to Plan Crop Rotation on an Allotment

Q: How many years should you rotate crops?

A 4-year rotation is the most common and practical for UK allotments. Each crop family returns to the same bed every 4 years, which is long enough to break most pest and disease cycles.

Q: What crops need to be rotated?

Brassicas, potatoes, legumes, and root vegetables are the four main groups that benefit most from rotation. Crops like courgettes, sweetcorn, and salads are more flexible.

Q: Can I rotate crops on a small allotment?

Yes. Even with limited space, a 3 or 4-bed rotation system can be adapted to smaller plots. The key is keeping brassicas away from where they grew the previous year.

Why rotate crops?

Growing the same crop family in the same bed year after year lets pests and diseases build up in the soil. Club root in brassicas, potato blight, onion white rot — all survive in the soil between seasons. Moving your crops breaks these cycles.

It also balances soil nutrients. Legumes fix nitrogen from the air, enriching soil for hungry crops like brassicas. Roots break up compaction and improve soil structure. Done well, rotation reduces how much you need to add to the soil artificially.

The standard 4-bed rotation

Divide your growing area into four roughly equal sections. Each section grows a different crop family, rotating one place along every year:

Bed 1

Brassicas

Cabbage, broccoli, kale, cauliflower, Brussels sprouts, turnips, swede

Add lime if pH below 6.5 to deter club root.

Bed 2

Roots & onions

Carrots, parsnips, beetroot, onions, leeks, garlic, celery

No fresh manure — causes forking in roots.

Bed 3

Legumes

Peas, broad beans, French beans, runner beans

Nitrogen-fixing. Follow with hungry brassicas.

Bed 4

Potatoes & tomatoes

Potatoes, tomatoes, peppers, aubergines

Needs well-manured, fertile soil.

Each year, move everything one position clockwise (or in a consistent direction you choose). After 4 years, each crop family is back where it started — having been on every bed once.

Crops that don't fit the rotation

Not everything needs to be strictly rotated. Permanent crops like asparagus, rhubarb, and fruit bushes have their own fixed beds. Flexible crops — courgettes, squash, sweetcorn, salads — can be slotted in as gap-fillers wherever space allows.

Flexible crops — grow anywhere

CourgettesSquashSweetcornCucumbersLettuceSpinachRadishesHerbs

The biggest challenge: remembering what grew where

The hardest part of crop rotation isn't understanding it — it's keeping track of it across seasons. Most allotment holders start with good intentions in March and by November have forgotten which bed the brassicas were in.

Vercro tracks your growing history automatically. You can see what grew in each bed, season by season, and plan your rotation based on actual records — not a fading memory or a note you can no longer find.

Frequently asked questions

How many years should you rotate crops?

A 4-year rotation is the most practical for UK allotments. Each crop family returns to the same bed every 4 years — long enough to break most pest and disease cycles.

What crops need to be rotated?

Brassicas, potatoes, legumes, and root vegetables benefit most from rotation. Courgettes, sweetcorn, and salads are more flexible.

Can I rotate crops on a small allotment?

Yes. Even with limited space, a 3 or 4-bed rotation can be adapted. At minimum, keep brassicas away from where they grew the previous year.

Track your rotation in Vercro

Vercro remembers what grew where, season by season — so you can plan next year's rotation based on real records, not guesswork.

Try Vercro free →