Sprouts won't sprout

may have been exposed to moisture prior to your obtaining them; or are 'old', etc, I'd contact the seller or look at the package and see if there is a date -

Have you tried playing the Shamisen to them? :)

Kidding aside, do you plant them in containers or in the garden? Radishes don't do well in containers, they need the full air and energy of mother Earth.

I keep sprouting seeds in the freezer, and they tend to keep a really long time. It can be that they are old. Do you have them in a warmer spot? Sometimes if the air is too chilly it keeps them from sprouting. Also, are you rinsing them with warm water? If you try again and get the same result I'd speak to the place you purchased them.

Thank you, not ordinary radish seeds, called Japanese Radish or Daikon, I do soak first overnight, in warm spot on kitchen window sill in triple storey sprouters, all others like mung & lentils sprout well in same place, no sell by date here. 4 different suppliers over the years, same miserable result. Will try again and soak for longer as I know outer shell is very hard. Failing which will see if the birds will eat them, although I doubt it, they are quite hot when sprouted

Good luck with this! Hope they sprout soon!