12 Most Common Issue With Growing Radishes (With Solutions!)

There are many reasons why you will encounter issues with growing your radishes. We will try to elaborate the main problems and come to a solution that will help you grow big and beautiful veggies.

Why are my radishes growing above ground?

Main reason why your radishes are growing above ground is the sown depth. Radish seeds should be planted at least an inch and a half for optimal growth. This issue can be solved with a little bit of dirt over your veggie.

Overcrowding can also be a reason why your radishes are poking out of the ground, try to spread your seeds more the next batch you plant.

Your gardening bed can be a little bit too shallow, and because of this your plant is rising through the topsoil. It does not have enough space underneath to form its roots and head.


Why are my radishes hollow?

A hollow radish is a sign of lack of nutrients, hot temperatures, and irregular watering. Some breeds have a tendency to get voids inside of them, if you have an issue with this the best solution would be to change the breed with the next batch you plant.

But remember if they taste fine there is nothing to worry about.


Why do my radish leaves have holes in them?

Flea beetles are most likely the reason why your leaves have round holes in them. Good news is that the holes are just cosmetic damage. Flea beetles don’t like wet soil, so this is an easy fix for your problem. The radishes love water, it helps them swell so you don’t actually harm the plant unless you over water constantly.


Why are my radish leaves turning yellow?

If we are talking about the first leaves, they are only going to last so long. True leaves will form and will start feeding your plant and remain green throughout its growing phase.

If the true leaves are the ones that are becoming yellow that means you have one of the following issues:

  • Insufficient water
  • Nutrient deficiency
  • Competing weeds
  • Overcrowding
  • Lack of sun
  • Pest & Diseases

Look at your plant, narrow down the list to one or two issues and then tackle your problem.

Why are my radish seedlings turning yellow?

Same as with the radish leaves. But do a pH check also. The pH levels should be in the 6.5-7 range.

Why are my radish leaves turning red?

It’s most likely a phosphorus deficiency in your soil. Check your leaves and see if the red color is mostly prevalent underneath the leaves. 

Before adding anything to your soil, check for nutrient deficiency with a test kit. Only after you are certain that the phosphorus levels are low will you know exactly how much to add to fix your issue.


Why are my radish leaves so tall?

This is most likely an overcrowding problem. Your plant does not have enough space so instead of growing wide it grows tall. This can also result in a non-existent harvest.

If the overcrowding is not the issue, too much nitrogen can force the plant to focus on green growth instead of root growth. Test your soil with a test kit to see if this is the case.

Why are my radishes all tops and no bottoms?

This is the same issue as with the tall leaves. Take a soil test kit and see if there isn’t too much nitrogen in the soil. Best solution would be to let the soil rest.

Why are my radish seedlings falling over?

There are three reasons out of the box that can ruin your seedlings.

  1. Low temperature
  2. Bad air flow
  3. Too much water in the soil

The temperature should be around 70° F (21° C).

Try adding a fan so your seedling grows a sturdier stem.

Drain the soil or stop watering for a while.


Why are my radishes spicy?

Main reason why your radishes are spicy is the late harvest. Harvesting your radishes too late will result them in being too spicy. High temperatures and insufficient water can also make them a little too spicy.


Why are my radishes black inside?

There are a couple of reasons. It’s either root rot or bruising.

If it’s root rot the low temperature and high moisture levels of the soil are the issue.


Why are my radish seeds not germinating?

The simple answer is temperature and water levels.
If the temperature is too high or it’s too wet, the germination process will be inhibited.