“Growing Radicchio from Seed: How to Sow, Grow & Care For.” www.johnnyseeds.com, www.johnnyseeds.com/growers-library/vegetables/chicory/radicchio-key-growing-information.html. Accessed 14 May 2022.
Organic Seed Alliance. The Grower’s Guide to Conducting On-Farm Variety Trials.
Poppe, Caleb. PNW Plant Fact Sheet: Radicchio. 2020.