Rotating vegetables is always recommended, but to do it properly, one needs to know which vegetables are in the same family. Related vegetables share disease problems, so a true rotation needs to be between vegetable families. Usually a 3-year rotation is advised, meaning that there will be 2 years of unrelated vegetables in the middle, between related vegetables.
Here are the most common vegetable, herb, and cover crop families:
| FAMILY | MEMBER PLANTS | 
| Allium | chive, garlic, garlic chive, leek, onion, perennial onion, shallot | 
| Amaranth | amaranth | 
| Brassica | bok choi, broccoli, Brussels sprouts, cabbage, cauliflower, Chinese cabbage, collard, horseradish, kale, kohlrabi, mustard, rutabaga, radish, turnip | 
| Composite | artichoke, chicory, endive, Jerusalem artichoke, lettuce, sunflower | 
| Curcurbit | cucumber, gourd, melon, pumpkin, squash (winter & summer), watermelon, zucchini | 
| Goosefoot | beet, chard, quinoa, spinach | 
| Grain | barley, corn, oats, rice, rye, wheat | 
| Legume | bean, clover, pea, vetch | 
| Lily | asparagus | 
| Mallow | okra | 
| Mint | basil, mint, oregano, sage | 
| Morning Glory | sweet potato | 
| Nightshade | eggplant, ground cherry, pepper, potato, tomatillo, tomato | 
| Rose | strawberry | 
| Smartweed | buckwheat, rhubarb, sorrel | 
| Umbel | carrot, celeriac, celery, dill, fennel, lovage, parley, parsnip | 
Last updated March 3, 2021