Question
How much thinning do I do when the radishes start coming up?

Answer
Hi Terre,
Thanx for your question.  I thin to about 1 inch in between plants.  This will give the radish plenty of space in which to grow.  I've always found this to be the best and I've had some nice, good-sized sweet radishes.  I especially like the French Breakfast and Sparkler because they are so colorful and the kids like them.  I hope this helps.
Tom