How big do Radishes get? (Can we grow bigger Radishes?)

Hey folks! Welcome back!

I hope you are doing great in your gardening field. You have filled your garden area with so many vegetables, plants, and trees. Have you grown radishes? if yes, then its great.

Do you know How big do Radishes get? You might be wondering how big radishes will get if you intend to cultivate them in your yard this year. By doing so, you may calculate how many plants and how much room you’ll need for your radish crop.

Key takeaways:

  • The root diameter of radish plants ranges from 1 to 4 inches (2.5 to 10.2 centimeters), while their height and width are 4 to 14 inches (10.2 to 35.6 centimeters) and 3 to 14 inches (7.6 to 35.6 centimeters), respectively.
  • Some tall radish types, like Daikon, can develop roots that are between eight and fourteen inches long (20.3 to 35.6 centimeters).

Of course, how well you take care of your plants will affect the quality of your radishes.

Let’s examine radishes in more detail, including their size, growing circumstances, and maturation period.

How big do Radishes get?

About Radishes

Radishes are one of the root vegetables that belong to the Brassicaceae family or cabbage family. Radishes are one of the famous crops whose cousins are cabbage, cauliflower, broccoli, kale, etc.

This plant is edible from roots to leaves, i.e., from top to bottom. So, you can enjoy its benefits by growing it in your garden area. You can eat it raw or even cooked. 

You can plant the seeds of radish at the time of spring season and even fall if you want to grow it in your home garden. Provide them with a good amount of temperature of about 70 degrees Fahrenheit or more. 

How big do Radishes get?

The stalks and leaves of radish plants can reach heights of 4 to 14 inches (10.2 to 35.6 centimeters) above ground and 3 to 14 inches (7.6 to 35.6 centimeters). One to two inches (2.5 to 5.1 cm) may be the maximum diameter of the roots of many small, spherical radish types.

The diameter of certain larger round radishes can reach 3 or 4 inches (7.6 to 10.2 cm). But before they become too big, you should pick your radishes. If you don’t, you’ll get radishes with a bitter taste. The longest and thinnest radish cultivars, like daikon, can reach heights of 8 to 14 inches (20.3 to 35.6 centimeters).

For more such plant related-articles, you may also read, Top 7 Carrot Varieties for Containers (and Where to get Seeds?)

How to Grow Bigger Radishes?

Time of Plantation

As soon as you can work the soil, you can plant radishes. They cannot stand high temperatures and will flee in the heat of the late summer. Therefore, sow a lot of them in the early spring. Later in the summer, you can start planting them once more in preparation for the fall.

Sunlight Requirements

To completely develop, radishes require around 6 hours of direct sunlight each day. Although they can take some shade, you’ll get the greatest results if no other veggies completely block their light. Because of this, radishes make a great container crop.

Fertilizer Use

Don’t overly enrich the soil when growing them, whether in the ground or a container. Much nitrogen is not suitable for radishes. You’ll get the most gorgeous radish tops with a frail tiny pink root if the soil is overly nitrogenous. 

How big do Radishes get?

We can all agree that the goal is to cultivate the root, not the top, even though radish leaves are edible (and rather nice). Therefore, you don’t need to fertilize the soil before planting your seedlings this time. Radishes can therefore be grown in soil that is a little low in nutrients and still thrives.

Loosen the Soil

Since radishes are a root crop, you want to make it as simple as possible for the portion that grows underground to develop and grow. The soil must be well worked for it to be loose and not compacted. The root will be more compressed by heavy soil, preventing radish growth. 

The soil should be loose to a depth of 4–6 inches, whether in a container or on the ground. When watering, use a light setting on your garden hose, such as a gentle spray. It also works excellently using a watering can with a sprinkler head. 

Better yet, once the plant has germinated, use a tiny cup and bucket to water directly at the base of the plant to save water and keep the soil moist and loose. To grow plants in containers like beets are grown in containers, I like to use a 3:1 mixture of potting soil and peat moss. The peat moss aids in keeping the soil moist.


Radishes can usually tell when they are being crowded out. Simply put, the radishes won’t grow well if they are planted too closely together. While the majority of information instructs to sow and then thin to 2″ apart, I’ve found that planting a single seed every 3″ has given me the best results. 

This conserves seeds and provides ample space for the radishes. Consider creating your seed tape using your preferred radish kinds to make sowing radishes simpler. It is inexpensive, rapid, and minimizes seed waste. 

Radishes are fairly good at germinating, so you’ll often get sprouts from every seed you sow. It happens that one or two seeds won’t sprout, but you can always plant another seed in that spot. Your seeds should be sown between 14″ and 12″ deep in terms of depth. 

Once more, if the seed is buried too deeply, the radish won’t be able to grow as it should due to the weight of the earth. The majority of the growth should take place in the top few inches of soil, if possible. After you’ve planted your seeds, carefully cover them with soil by running your palm over the top. Give the seeds a thorough yet gentle soak before watering them in.

Maintain Soil Moistness

Maintaining constant moisture in the soil is crucial, especially during germination. While you wait for the radishes to emerge, you’ll probably need to water them every day. You can water less regularly when the leaves have fallen. 

You don’t want them to fully dry out, though. When the soil is just barely moist, radishes grow best. Don’t rely on your eyes; place your finger in the soil and water the plants once the top 1 to 2 inches of soil are dry. 

How to Harvest Radishes in your garden? 

Gardners do not harvest the radishes on time which will make them taste starch after you harvest them so important to know how to harvest radishes in your garden.

You have to harvest the plant after it becomes fully mature. Below are the steps that you have to follow for harvesting the plant.

  • You have to see the seed packet to harvest. The plant as every type of rash has its growing conditions.
  • When the growth of the green attains a height of 6 to 8 inches above the level of the soil, then you can harvest the radishes. 

How to Store Radishes? 

  • Cut off the tops and the thin root tail, wash the radishes, and dry them thoroughly. Store in produce or zip-top bags in the crisper drawer of the refrigerator.
  • Radish greens can be stored separately for up to 3 days. Put them in a separate produce bag with a dry paper towel.


You now have a much better understanding of how large radishes can grow, both in terms of the underground root and the stalks above ground. Radishes are one of the root vegetables that belong to the Brassicaceae family or cabbage family.

Radishes are one of the famous crops whose cousins are cabbage, cauliflower, broccoli, kale, etc. Additionally, you are more knowledgeable about the care required to guarantee a robust crop of radishes in the garden this year.

Thanks for reading! Happy gardening! 

Becky Decker

Becky Decker, our esteemed Editor-in-Chief, is a passionate gardener with years of experience in the world of horticulture. With her guidance, aims to be your trusted companion on your gardening journey. Featured In   Becky Decker’s expertise and gardening wisdom have been recognized and featured in various prominent publications, including: Yahoonews  Experience & Background   Becky Decker’s love for gardening has been a lifelong journey. She has honed her skills through countless seasons of planting, nurturing, and harvesting a wide variety of plants, flowers, and vegetables. Her deep-rooted knowledge is complemented by her Bachelor’s degree in Horticulture from the University of Green Valley.   Prior to leading, Becky worked as a garden consultant, helping countless individuals turn their outdoor spaces into vibrant, thriving gardens. Her experience spans over a decade, making her a trusted authority in the gardening community.   The Birth of   Inspired by her passion for gardening and her desire to share her expertise with a wider audience, Becky Decker launched in 2021. This platform serves as a hub for gardening enthusiasts of all levels, from beginners to seasoned pros.   At, we are committed to providing you with comprehensive guides, expert advice, and hands-on tips to help you achieve success in your gardening endeavors. Whether you have a small balcony garden or a sprawling backyard paradise, we have the information you need to make your garden flourish.   Our Mission is more than just a gardening website; it’s a community of gardeners who share a common love for nurturing the Earth. Our mission is to empower you with the knowledge and resources to create beautiful, sustainable gardens that bring joy and tranquility to your life.   Join Us on This Green Journey   We invite you to explore and embark on your gardening journey with us. Whether you’re seeking advice on planting techniques, pest control, landscaping ideas, or the latest gardening trends, you’ll find it all right here.   Connect with us, ask questions, and share your gardening stories. Together, we’ll cultivate a thriving community of gardeners and help each other make the world a greener, more beautiful place.   Let’s dig in and grow together at, where gardening dreams bloom!

You may also like...

Ask in Community