Why not pickle those fresh radishes? By Tracy Turner - Ohio State University Extension Radishes are low in calories and are a source of potassium; calcium; sodium; and vitamins A, B, C, and K. Radishes are a cruciferous vegetable in the same plant family as kale, turnips, and broccoli. They can also help lower blood pressure and can be associated with a lower risk of heart disease, research shows. Ohio State University Extension I’ve got a fresh harvest of spring radishes in my garden, but other than adding them to my salad, I’m not sure what to do with them. Got any ideas?