I have changed the location in the garden, altered the fertilization and tried about everything else, but nothing works. The tops of the plants are healthy, but the radish itself does not produce. There are no problems with the other root crops. Ind. A. Radishes may produce poorly developed roots for several reasons. Seedlings that are not thinned in early spring don't develop the normal enlarged root since they are competing for space, water and nutrition.
Radishes are a cool-season crop.
The soil brings up another possibility. Rich, organic soils or heavy fertilization can promote foliage growth at the expense of the roots. Try raising the radishes in a raised bed, in different soil, in full sun and thin to one inch apart. Keep your eyes open for other symptoms, since club root or root maggots could be other possibilities. Q. We live in a rural area and have deer around all the time.