Once radishes flower they're done.

Rodney

Once radishes get some age on them they get woody and/or "hot" + bitter anyway. It's a veggie best enjoyed immature in it's growth stage.

Once they get past a certain point their best use is making seed for future crops...unless you happen to enjoy extremely "crisp" radishes with a bitter heat flavor.

There are storage varieties that make roots that will keep over winter if protected. Those would then shoot and make seed in the spring, qualifying them as biennials.

Plant survival and edibility are two things. Small spring radishes are just good fro a few weeks for eaeting. Then they will bolt or tubers will crack and get wood. But some of the green can be edible. But it will never grow another tuber.

Last fall Iplanted some chinese winter radishes. They did not bulb because I think I planted them too late. Anyway, the overwintered an I kept a few of them to go for seed and the did. They were still live after first set of seeds and were flowering more . the I just pulled them, since I got the seeds I wanted. Now my winter radishes are growing. If I let them they will keep on going till the end of next summer.

The point is that, they wont just die off fast. They are sort of like carrots.

As a general rule of thumb, root crops do not do well with transplanting. This includes: beets, carrots, turnips, radish, Swiss chard (I know, it's grown for its leaves, but it has a deep tap root), parslely (for the same reason), etc.

Here is a link that might be useful: Alan Chadwick