Although I have never grown it, I couldn't resist a pack of four raddichio plants today at the garden center. I assume I will be able to harvest some outer leaves this spring and summer to spice up some salads, and then it sounds like they might form heads in the fall. My question is what spacing you would suggest for this planting in a SFG? And if I am incorrect in my other assumptions, will appreciate any insights those more experienced might be able to offer.

Thanks!