How to Grow Radicchio

Start Radicchio seeds indoors 4 weeks before your last frost date, then transplant outdoors -2 weeks after the last frost. Use the search on this page to find exact dates for your ZIP code or city.

Radicchio typically matures in about 80 days from planting. Exact timing varies by variety, soil conditions, and local climate.

Radicchio should be started indoors 4 weeks before the last frost date. This gives seedlings time to establish before being transplanted outside after frost danger has passed.

Radicchio requires full sun to partial shade to thrive.

Space Radicchio plants 10 inches apart to allow adequate airflow and root development.

Radicchio has regular (keep moist) water needs. Consistent moisture is important especially during germination and early growth.

Yes — seed saving difficulty for Radicchio is rated moderate. Allow plants to bolt in year 2 and seed heads to dry on the stalk. Cut dried stalks, thresh and winnow to separate seeds.

Properly dried and stored Radicchio seeds remain viable for up to 3 years. Store in a cool, dark, dry location in an airtight container with a silica gel packet for best results.

Yes — Radicchio is open-pollinated, meaning seeds saved from your harvest will grow plants true to the parent variety. This makes it an excellent candidate for building a self-sustaining garden.