Plant family

Radicchio belongs to the aster or daisy family (Asteraceae), specifically the chicory group. Its close relatives that share many of the same pests and diseases include endive, escarole, Belgian endive (witloof chicory), lettuce, and to a lesser degree artichokes and sunflowers.

Why rotate radicchio

When radicchio or its chicory and lettuce relatives grow in the same spot year after year, soilborne problems like Sclerotinia (white mold), bottom rot (Rhizoctonia), and root aphids can build up in the soil. Slugs and the fungal leaf spots that favor dense, leafy plantings also tend to increase. Because radicchio is a moderate feeder that pulls steady nitrogen for leafy growth, repeat plantings can also leave the bed short on nutrients.

What to plant after

Radicchio does well after legumes such as beans or peas, which fix nitrogen and leave the soil richer for leafy growth. It also follows heavy feeders like squash, corn, or brassicas nicely, and coming after an unrelated root crop such as carrots or beets helps break the chicory-family disease cycle.

What to avoid

Avoid planting radicchio right before or after other members of the aster and chicory group, including lettuce, endive, escarole, and Belgian endive, since they share white mold, bottom rot, and aphid problems that compound in the soil. Following radicchio with these relatives simply hands the next crop the same pest and disease pressure.

Example rotation

A simple four-year bed rotation could run: Year 1 legumes (bush beans or peas), Year 2 radicchio and other leafy greens, Year 3 fruiting crops like tomatoes or squash, and Year 4 root crops such as carrots or onions. After the fourth year you return to legumes and start again, which keeps roughly four seasons between chicory-family plantings in any given bed.

Tips

Keep a simple garden map or notebook so you know which bed held radicchio and its relatives each year, and try to wait at least three years before chicory-family greens return to the same spot. Sowing a cover crop of clover or another legume in the off-season adds organic matter and nitrogen while giving disease organisms time to fade.

General guidance for US home gardens. Adapt to your own crops, soil, and space; your Cooperative Extension office can help with a plan for your area. Page updated Aug 4, 2026.