Also question is, are radishes seasonal?
Radishes are available most of the year—large storage varieties keep well throughout the winter—but smaller, more delicate-tasting radishes are a springtime treat. They're in season in April!
Subsequently, question is, can radishes survive winter? Radishes can tolerate frost and temps down to the mid-20s, but may be damaged or killed by a sustained hard freeze — in particular in the late fall when they won't have a chance to recover as winter sets in.
Similarly, you may ask, why do radishes grow so well in the winter?
They store very well right where they're planted (as long as the soil isn't frozen). Winter radishes crave the cold, so they also keep nicely in cold basements and refrigerators for months at a time. To keep them firm in the fridge, I remove the greens and store the roots in plastic bags or wrap them in damp towels.
Do radishes come back every year?
You can make more radishes from radishes by replanting the root. Other parts of the radish will not regrow if you plant them again. If you do live in an area that does not freeze, you can plant radish seeds or roots year-round.