I have written about rotation before and about the rotation scheme I use. Too often, I see gardens in which the same family of food plants are grown year after year in the same place. I can even observe what looks to be a decline in plant health and vigor, and production, over the years when this is done. Rotation, or moving plants of the same family to a different section of garden each year, is important. Plants in the same family can exhaust the soil of specific nutrients and encourage pests. Moving the plants to a new area can help build the soil and can reduce pest damage. I gave a simple roatiion scheme last year, but the Feb/March, 2010 edition of Mother Earth News gives a more comprehensive look at rotation and a more extensive rotation scheme. They list 9 main groups or families of crops that should be rotated together in a 3 to 4 year rotation scheme.
The first family of plants that I am most concerned about is the tomato family (tomatoes are often listed as the number one reason people have a vegetable garden). So, here goes:
1. The tomato family: includes peppers, eggplants and white potatoes.
2. The onion family: onions, garlic, leeks and shallots.
3. The carrot family: carrots, celery, parsnips and parsley.
4. The cabbage family: cabbage, broccoli, Brussels sprouts, kale, rutabagas, kohlrabi, other leafy greens
5. The spinach family: includes beets and chard
6. The pea family: peas and beans
7. The sunflower family: sunflowers, lettuces and some other leafy greens
8. The cucumber family: cukes, melons, squash and gourds
9. Grass family: corn, wheat, oats and rye.
It is a good idea to have separate vegetable garden beds, one for each family of plants that you grow, in which to rotate. There is no perfect way to do this- some plants are large and take up a lot of space, some smaller and take up less, but sometimes combining two families in a rotation will work. For example, if you grow a small amount of lettuce and a few beets, they can be put in one rotation, and your cucumber family in another. At times I have run out of rotation room and have built a new veg garden bed to use for that year (and it is mostly for the tomato family).
So remember rotation! and Happy Gardening!