Square-Foot Gardening Radish [How to Grow]

Radishes are an excellent choice for new gardeners looking to grow something other than tomatoes or lettuce. Radishes provide a great introduction to square-foot gardening.

They grow well in almost any soil type and are easy to harvest. Radishes are also one of the earliest crops to be ready for harvest, so radishes are the perfect way to start your square-foot gardening season early.

Also Read: Square Foot Gardening Onions [Best Tips & Tricks]

Seed Spacing Template, Square Foot Gardening Seed Sowing Tool Kit, DIY Gardening for Fruit Vegetables Herb Seedling, Include Seed Ruler/Seed Spoon and Planting Guide-Blue

Square-Foot Gardening

Square-foot gardening isn’t just for small spaces; you can use it anywhere from an apartment balcony in New York City to a large backyard in the middle of Wyoming.

The idea behind square-foot gardening is based on the concept of intensive planting.

Instead of growing one vegetable per bed or container, you grow many different types together at once, so you can enjoy abundant fresh produce throughout the season.

By carefully planning which plants go where (and when), you’ll get the most out of your space and ensure no weeds or pests are taking over your garden during its prime growing time!

In his 1981 book, “All New Square Foot Gardening, ” Mel Bartholomew popularized square foot gardening.”

The Benefits of Square Foot Gardening

If you’re a city dweller, you know that space is at a premium. But you also know many benefits of gardening: healthier food and a greater connection to nature.

Here are the benefits of making a square-foot garden (SFG) work in your urban landscape!

Small Space

You can grow your crops in smaller spaces, so you don’t need an entire acre of land to supplement your diet with fresh produce.

Plant Yield

Because the plants are closer together, they are easier and faster to harvest than if they were spread out over acres of land. This means you’ll have fresh produce right at your fingertips!


When you have easy access to your vegetables, you’re more likely to eat them.

So you’ll get all kinds of nutritional benefits from eating fresh fruits and vegetables without having to do anything but go out and pick them from your square-foot garden!


With less overall space needed, there is less to maintain. You don’t need as much water or fertilizer because there are fewer plants per square foot than in traditional gardening methods.


Weeds thrive in larger spaces where there are more open spaces between plants.

Square foot gardening requires everything to grow close together, so every crop has its own little patch of soil.

If the plants are close together, weeds have difficulty taking over and spreading throughout your garden bed.

You can weed around each plant when necessary and don’t have to worry about the weeds taking over your garden bed.

Check out: Square Foot Gardening Cucumbers [Helpful Tips]

Seeding Square – Seed Sowing Template for Maximum Harvest - Square Foot Gardening Tool Kit – Includes: Color Coded Seed Spacer & Magnetic Seed Dibber/Seed Ruler/Seed Spoon & Vegetable Planting Guide

How To Build a Square Foot Garden

If you’re looking for a way to grow vegetables without the hassle of digging and tilling a garden, building a raised bed SFG is the answer.

Raised beds are an easy and effective way to contain healthy soil in your garden and require very little maintenance.

To build a square foot garden, measure the area where 4-foot by 4-foot boards will be placed.

Go to your local lumber store for some boards to make the frame.

We recommend untreated cedar, redwood, or pine for this project. They will last a long time without leaching chemicals into your soil.

You need two 8-foot lengths of 2x6s for each bed, some wood screws, and string or nails for making the grid.

Next, take your 2×6 boards and cut them down to size, so they make a 4-foot by 4-foot frame.

Use 6-inch wood screws to attach the boards, making sure they’re spaced evenly apart and solidly connected so they can support the weight of the soil.

Fill your frame with a soil mix of 1/3 peat moss or coconut coir, 1/3 finished compost, and 1/3 vermiculite.

This combination will provide good drainage while retaining moisture in the ground below.

The last step is to lay down string or nails across each row, so they form a grid system for planting seeds or seedlings!

Make each square 12 inches by 12 inches. The grid makes it easy for you to know exactly where everything has been planted, so you can space things correctly.

Read: Square Foot Gardening Bush Beans [Best Methods to Grow]

Growing Radishes in a Square Foot Garden

Radishes are great crops for your square-foot garden. They’re easy to grow. They can be harvested in as little as three weeks!

Radishes are a member of the Brassicaceae family, which includes other garden vegetables such as cabbage, kale, and collards.

They taste peppery and can be eaten raw or cooked. Radishes are grown for their roots, but the leaves can be eaten raw, like lettuce, or cooked like spinach.

This root vegetable quickly grows from seed to harvest. They can be planted more than once per season and need cool weather and bright light to grow best.

Radishes like the full sun and need at least 6 hours of light per day.

They like moist, fertile soil, so if you’re planting them in your SFG, ensure that you’ve prepared the soil properly before adding them to your planter boxes.

Plant them in loose soil that drains well and has plenty of organic matter added before seeding.

Radishes don’t grow bulbs if they’re overcrowded, so make sure that you space them out about 2 inches apart in the SFG planter boxes.

They grow best in the cool days of early spring, but some varieties will continue to grow until late summer if planted late in the season.

Radishes are often used as companion plants for other vegetables because they help deter bugs from attacking nearby plants.

Have a look: Square Foot Gardening Kale

No-Till Garden Farm and Garden Cover Crop Mix Seeds - 5 Lbs - Blend of Gardening Cover Crop Seeds: Hairy Vetch, Daikon Radish, Forage Collards, Triticale, More

When To Plant Radishes

There is no single best time to plant radishes, but there are two times of the year when you can be reasonably certain that they will grow well in your area.

To ensure the best germination in your spring planting, sow seeds 4 to 6 weeks before the last frost of spring.

To plant a fall crop, plant seeds in your square foot garden 4 to 6 weeks before the first frost.

Both these periods offer the perfect conditions for radishes’ growth because they provide plenty of moisture and warmth.

Spring and fall also allow them enough time to mature before winter sets in again or the summer heat kicks in.

If you’re planting beetroots during autumn, it’s worth noting that this will give you a longer growing season, as long as there aren’t any late frosts after your seeds have been planted.

Harvesting and Storing Radishes

Radishes are ready for harvest when their roots are about 1 inch or 2.5 cm across. To test them, pull up one plant and check its size.

You can use a knife or fork to loosen the soil around the roots of each plant and gently lift it out of the ground by its leaves.

Be careful not to break off any of the leaves as you pull the radish out.

To store your radishes, cut off the greens and place the radish bulb in a jar filled with water for one week in your fridge. This will keep them fresh until you’re ready to eat them!

If you want them to stay fresh longer, blanch them first by boiling water in a pot on the stove with a lid on top for 5 minutes.

Place them in freezer bags or containers and freeze them for up to six months!

Check the post: What You Need To Know About Square Foot Gardening Spacing

Planting Radishes in a Square Foot Garden

Gardeners have found a way to plant vegetables without weeding and without tilling, or bending, in a raised bed by using this method.

The grid is the key to square-foot gardening. The grid allows you to plant in blocks of 12 inches x 12 inches, dividing your garden into smaller sections.

This grid keeps plants straight and organized, making it easy to see where you have planted.

Radishes are a great crop to plant in your garden. They don’t take up much space, so you can plant them in a square-foot garden if you don’t have a lot of space.

Radishes grow best in full sun and well-drained soil. If you have heavy clay soil, preparing the bed with plenty of organic matter like compost or aged manure before planting is best.

To plant radishes:

  1. Add some organic matter to the square-foot garden bed before planting any seeds. This will help keep the soil loose and give your radishes space to grow.
  2. Sow the seeds about .5 inches deep and then cover them with dirt. Don’t cover them too deeply—just make sure that they’re covered enough that they don’t get washed away in heavy rain or windy weather.
  3. When you water after seeding, ensure that you water 6″ deep so that the seeds get plenty of moisture from the bottom up.
  4. Space individual plants 1 to 2 inches apart so that there’s plenty of room for growth!
  5. Finally, add more seeds every 10 days in early spring for constant crops through early summer.

Read: Square-Foot Gardening Soil Mix [Best Tips & Tricks]

Garden Grid Watering System | Preassembled Drip Irrigation, Soaker Hose & Sprayer Style Kit, in One | Square Foot Gardening, Raised Bed Gardens, Planters, Containers - 4x4 (44"x44")

Troubleshooting Radish Growth Problems

Radishes are a funny little vegetable. They’re easy to grow and good for you, but they don’t always cooperate.

Let’s look at some of the most common issues with radish planting and how to fix them.

All Greenery and No Bulbs

Radishes are quick growers, but they’re also shallow-rooted.

That means that if you give them too much fertilizer, the greens will grow like crazy, and the bulbs won’t get enough nutrients from the soil.

To correct the problem, decrease the amount of fertilizer you apply during the growing season.

If over-fertilizing isn’t the issue, they may be growing leaves because of environmental conditions.

Radishes grow best in cool weather with a temperature range of between 60 and 65 degrees Fahrenheit—warmer temperatures can cause them to go to seed quickly.

Tiny Radish Bulbs

If you plant your radishes too close together, their root systems will overlap and compete with each other for nutrients in the soil.

You may end up with lots of skinny radishes instead of large ones!

To solve a tiny radish problem, plant them 2 inches apart in rows that are 18 inches apart. That way, the bulbs will have plenty of room to grow, and the greens won’t crowd each other out.

You can also get away with giving them a little less fertilizer than you would other vegetables.

Flowering Radishes

If your radishes are growing white and pink flowers, it is a sign they have been left in your garden too long.

While flowering radishes are still edible, you may find they become more bitter tasting.

When the temperature stays above 70 degrees, it’s time to stop planting radishes. Plant them again in the fall when temperatures drop below 70 degrees to grow late-season crops.

Check out: Companion planting square foot gardening [Complete Guide]

Gardzen 2 Pack Divided Raised Vegetable Bed, Square Foot Gardening 2Feet x 2Feet - Having Your Own Garden

Frequently Asked Questions

Let’s review two frequently asked questions for new square-foot gardeners.

Can I start my radish plants from seeds indoors?

Radishes don’t like to be transplanted. So if you start them from seeds indoors and transplant them into the ground, they have difficulty adjusting to the change.
The same goes for being too hot—they’re not going to do well in an environment that’s too warm for your house.
If you’re trying to get more plants to grow faster to harvest them sooner, it’s better just to plant them outside.
It doesn’t take long for radishes to germinate once they’re outside, and with less risk of failure on your part!

How many radish plants can I plant in my SFG garden?

We recommend planting 16 seeds in each 12-inch x 12-inch square. Make sure not to overcrowd the seedlings. Watch out for root competition among your radishes.

Square Foot Gardening Radish
Square Foot Gardening Radish

Furthermore, you may like some more gardening articles:


Radishes are easy to grow in spring or fall, and we recommend making raised square-foot garden beds.

Radishes are a great crop to grow in your garden because they’re versatile—you can eat them raw or cook them.

Plus, you can harvest them any size, so you always have fresh radish greens!

When planting radishes, make sure to keep them well-watered. They do best in full sun, with loose soil and good drainage.