With the exception of perennial crops such as Rhubarb , Asparagus, fruit and other perennial specialised veg, crop rotation should be considered for all other crops to minimise fungus and pest problems in the soil. The essential principle leans towards a mono crop system of grouping specific veg and ensuring the same veg is not grown in the same patch of soil for the next few years.
Most plot holders opt for either a 3 year or 4 year rotation ,dividing the plot into subsections aids in maintaining rotation. It is worth bearing in mind that mono cropping has its own problems.
Benefits of Crop Rotation
Enhances soil fertility by balancing nutrients for example beans produce nitrogen in their roots which enhances growth of the following crop.
Weed Control – some crops with large foliage supress weeds reducing maintenance for the following crops
Loosening Soil – root veg due to their nature loosen the soil assisting the next veg to grow without compact soil hindrance
Soil pests/disease – These tend to attack specific plant families and could wipe out crops if left unchecked. Rotating crops between sites helps to decline pests due to the absence of their host plants for example Onion white rot, pests and diseases that impact Brassicas, Tomatoes or Potatoes.
Keel Drive Allotments 