Plants that make big roots (eg: carrots, potatoes) use different nutrients than plants with lots of leafy growth. By rotating groups of plants that use different soil nutrients, the maximum potential of a single plot of soil is exploited. Crop rotation also breaks up the life cycles of diseases and insect pests so they don’t become fully entrenched in the soil. Finally, as limed soil in a new garden is exposed to rain and slowly robbed of its nutrients, the acidity of the soil increases. This benefits some plants but also becomes unsuitable for others. Crop rotation is one way of taking advantage of this natural process.
The standard crop rotation model begins with a fresh garden plot with new compost and lime added. This will produce a soil with a higher than average pH or alkalinity.
Year 1: plant brassicas, spinach, salad greens and other leafy vegetables.