On Oct 21, 2005, Farmerdill from Augusta, GA (Zone 8a) wrote:
A red heading cultivar that resists bolting and will color up even in summer.
Note:"Ideally, radicchio has a spicy and mildly bitter taste. A strong bitter taste, and toughness, develops if harvest is delayed or if crop is over-mature, and then the product become unmarketable. " Oregon State University