Answer: All top and little or no bulb growth is commonly caused by too much shade, seeding too thickly or planting in soils that have too much nitrogen and too little potassium. Radish plants need just the opposite, which is low nitrogen and high potassium (which encourages root growth). They grow best in cool weather so that might contribute to the problem if you are trying to grow them in the summer months. Hope this information helps!
Q&A Library Searching Tips