HomeGardening Tips And AdviceUltimate Guide To Growing Organic Radishes

Ultimate Guide To Growing Organic Radishes

Follow our advice and learn how easy it is to grow radishes!

Growing radishes predates the Roman empire; the word “radish” comes from the Latin word “radix,” which means “root” (the Romans were good with a sword but not with names!).

The radish has near relatives in mustard and turnips.

Growing radishes may be a fun and colourful hobby. Radishes come in a variety of colours, sizes, and forms, ranging from red, pink, and white to gray-black or yellow radishes, with the red round radish being the most popular.


Early spring radishes usually provide our first crop of the year, or at the very least compete with leaf lettuce.

Radishes can normally be planted in early to mid May and eaten in salads by mid-June.

Radishes can take anywhere from 25 to 45 days to mature after being planted in your garden, depending on the type.

If you reside in a warm area, you can start planting in mid- to late-January. Plant a new patch every 7 to 10 days to ensure ongoing harvests.

Plant 2 to 3 weeks before the last frost in northern regions, then again in late August or early September for an autumn crop.

Radishes can endure even the worst of frosts.

Radishes are a cool-weather crop that bolt (go to seed) quickly in the summer heat, so avoid planting them in the summer.

Radishes can develop a bitter flavour and root hollows as a result of the hot weather.

Some kinds that mature later, like as Icicle or French Breakfast, may endure summer heat and hence be be planted later in the spring for summer harvesting.

Winter radish cultivars take longer to mature than spring radish varieties, so start planting them in mid-August.


Radishes thrive in a region with at least 6 hours of direct sunlight every day, although little afternoon shade is also fine.

As previously said, radishes love chilly temperatures, so some shade is acceptable if the weather is expected to get too hot by harvest time.

Radishes, like most root crops, want soil that drains well. And, like most root crops, they like soil that has been loosened sufficiently to allow their roots to penetrate deep into the earth.

If you have the opportunity, plant your radishes on sandy soil with plenty of organic materials. Compost will provide the necessary organic materials.


Radish grow best on soil with a pH balance of 5.8 to 6.8, however 6.0 to 6.5 is the ideal range.

Check the pH balance of your soil with a pH tester. Add enough sulphur to bring it down below 6.8 if it’s excessively alkaline.

If your soil is too acidic (below 5.8), applying lime is the quickest approach to raise the pH.

Rototill 2 to 4 inches of well-aged compost into the soil before planting radishes. This should provide your radishes with the majority of the nutrients they require during their brief growing season. Every few of feet down the rows, a handful of bone meal can also assist.

Smooth out your soil after tilling it, removing any rocks, sticks, or other debris before planting.


Every season has its own radishes. Find out whether seeds are disease resistant in your area by visiting your local garden store.

Also, check with your local garden centre to determine which types are best for harvesting radishes at different times of the year.

Winter radishes need roughly 8 to 10 weeks to mature, but spring radishes take 3 to 6 weeks.

Larger businesses are likely to have less informed personnel than a small, locally owned garden store, but this isn’t always the case. I’ve discovered several very competent personnel at our local Home Depot, so figure out who you can trust and double-check the information they provide, regardless of how big or small the business is. If you obtain contradicting information, check with your county extension office.


Radish seeds can be stored for up to four years after purchase.

Radishes prefer cooler temperatures, but they may sprout in temperatures ranging from 40 to 90 degrees Fahrenheit.

The ideal temperature range, on the other hand, is 50° to 75°F.

Radishes will typically emerge from the ground in 5 to 10 days at these temperatures, depending on the weather.

Throughout the life of your radishes, the soil must be kept moist. This is usually not a problem because they grow so well in the spring, which is typically a wet season in many regions.

Radishes grow best in moist, 50° to 65°F temperatures from seeding to harvesting.


It is not required to plant radishes inside in the spring because they are such an easy crop to grow practically anywhere.

The sole exception is if you don’t have enough space for a garden, in which case you can use a container.

Half and half compost and sterile potting soil, both available at any garden centre.

Press the mixture into your container, such as a terracotta pot or a 5-gallon bucket, lightly. If you’re going to use a bucket, ensure sure the bottom has enough holes for water to drain effectively.

Plant your seeds in the pot by scattering a few seeds per square inch and raking them in with a fork. Softly press the earth to seal the seeds in, and lightly water to ensure that they have adequate moisture to germinate.

Make sure the seeds are half an inch to an inch deep in the soil using the above approach.

Once the seedlings have sprouted, thin them to about 2 inches apart and 2 inches from the container’s side.


Radish are a cold-hardy plant that can be planted well before the final frost, as we’ve already described. We normally start planting around the first of May, a few weeks before the final average frost date.

We planted around the first of May last year, only to have a late frost towards the end of May. The radishes, on the other hand, were unharmed.

Make a tiny trench with an old spoon or a sharp-tipped trowel, no more than an inch deep, to mark your rows. Make three or four rows, spacing them six to twelve inches apart. That’s a lot of radishes for us. There’s just so many radishes I can eat in a year!

Plant your seeds approximately half an inch to an inch deep in the trenches. Backfill the dirt over the seeds and lightly push it down to ensure that the seeds have as much soil contact as possible.

Lightly water the newly planted seeds if the soil need it.


After the radishes have emerged from the earth, thin them to about 2 inches apart. Radishes in the winter may need to be thinned to 4 inches apart.

Watering won’t be necessary if your spring is wet, but if it’s a dry year, water as often as necessary to keep the soil moist.

Use a floating row cover over your radishes to keep feather varmints out of your radish patch if you have problems with birds eating on your seedlings.

Tip: When growing radishes, spray your plants with a liquid organic leaf spray fertiliser every couple of weeks. Organic Garden Miracle comes highly recommended. In the photosynthesis process, it naturally promotes your garden plants to create more plant sugar. As a result, your plant will be more vigorous, you will have more food from your garden, and the flavour will be better and sweeter. They also come with a fantastic warranty!


A small layer of straw or grass clippings mulched around your radish plants can keep the soil cool and weed-free.

Any weeds that have grown up around your radishes should be carefully plucked or clipped off so that the radishes do not have to compete for nutrition.

Maintaining a gently cultivated, moist, and weed-free soil surface will provide your radishes with the love they require to thrive.

Hoeing too near or too deep around radishes or any other root crop will harm the roots and, as a result, the plants.


Watering requirements will vary depending on the radishes kinds you plant.

Year-to-year watering requirements will also vary. We had a cool, wet spring and summer last year, so we watered much less than usual.

It’s a good idea to irrigate your summer radish patch with an inch of water a couple of times a week during hot weather.

In our location, spring radishes rarely require water, but this may not be the case in yours. Simply keep the soil damp but not wet at least 6 inches below the surface.

During the growth season, vegetables require at least 1 inch of water from rainfall or irrigation each week.

More regular watering may be required in sandier soil. Mulched soil may require less water. It’ll take some time for you to get a feel for it.

Drip irrigation is superior to overhead watering for most vegetables, but drip systems may be too expensive for the backyard or hobby gardener.

If you use overhead watering like we do, start watering earlier in the day so your plants can dry up by noon, if possible.

If your radishes are exposed to too much heat and dryness, they will bolt (go to seed). Your radishes may lose flavour and/or develop hollow hearts as a result of this.

Watering radishes lightly is nearly worthless. Make sure your water penetrates the soil at least 6 inches.


Squash family members, peas, spinach, melons, lettuce, carrots, pole beans, beets, nasturtiums, and chervil are all good radishes companions.

In one research, radish placed alongside broccoli significantly reduced flea beetle damage to broccoli because the bugs preferred the radish.

Beets are a good choice before radishes because they add minerals to the soil.

Pole beans, bush beans, and peas fix nitrogen from the atmosphere into the soil, which helps radish thrive.

Cucumber beetles and rust flies, which are pests of carrots and cucumbers, are said to be repellent to radishes.

Chervil and Nasturtiums are supposed to increase radish flavour and speed up growth. I haven’t tested this one yet, so don’t hold it against me if it fails!).

In the summer, lettuce is reported to enhance radishes by making them more juicy; I haven’t tested this yet.

Radishes are good for you. Spinach is protected from leaf miners by attracting them away from the plant. Leaf miner damage to radish leaves has little effect on the roots.

Turnips and potatoes don’t mix well with radishes.

Root crops such as turnips and potatoes compete with developing radishes for nutrients, lowering crop yield.

Because radishes mature faster than parsnips, carrots, parsley, squash, tomatoes, or cabbage family crops, they can be planted with them. This is known as “intercropping,” and it can help you save space in your garden if necessary.

Radishes should not be planted more than three or four times in the same spot.


Your radish roots are ready to harvest when they are 1 to 1-1/2 inches in diameter. When the radish is ready to harvest, the “shoulder” will spring up above the dirt. The roots will turn pithy, flavourless, and woody if not harvested within a day or two.

Around 3 to 5 weeks after seeding, spring radishes are ready to harvest.

Summer radishes come in a variety of sizes, colours, and flavours, but the highest quality radish comes from harvesting them young.

If they get overripe, the greatest use for them is in your compost heap, where they can be recycled.

Winter radishes are typically “black,” “white,” or “green,” and must be collected at a bigger size.


After pulling your radishes, wash them, cut the stems off about an inch above the root, and store them in plastic zip-lock bags in the fridge for up to 2 weeks.

Black winter radishes, Chinese radishes, and Daikon radishes can be stored in a dark cooler/reefer for up to 4 months at 32°F and 95 percent humidity.

Some gardeners have claimed success burying radishes in root cellar dirt for up to a month…I haven’t tried it myself because I can only eat a few radishes per year.

Radishes, as far as we know, cannot be successfully frozen or dehydrated.

Although we haven’t tried it, we’ve heard from some canning experts that summer and winter radishes can be pickled; perhaps we’ll try it next spring.


Cabbage root maggots are a little white insect that burrows into the roots of your radish plants. They’re made by a fly that resembles a normal housefly but is a little smaller.

These microscopic maggots are difficult to spot because your plants will not wilt unless it is extremely hot outside and your plants are extensively infested, which is rare.

The quality of your radish crop, on the other hand, will be harmed.

Row covers are one way to keep flies out in the spring, but you’ll need to put them on before your plants come up.

The use of diatomaceous earth to dust the region has proven to be particularly effective in the fight against maggots. The razor sharp edges of food-grade diatomaceous earth, which is made up of powdered fossilised algae, are harmless to most mammals but deadly to insects.

Diatomaceous earth punctures the stomachs of insects including slugs, thrips, fly maggots, aphids, grubs, caterpillars, and mites, causing them to die of dehydration.

Another garden insect that attacks radish, as well as other garden products, is flea beetles.

These tiny insects tear holes in seedling leaves and stems when they’re most vulnerable, weakening or killing the plants.

When entirely sealed with mud or sandbags, row coverings are effective.

Check under your row covers to make sure the beetles haven’t gotten to your plants yet, and that weeds aren’t choking them as well.

Your plants’ resistance to flea beetles is aided by proper nutrition and moisture. Getting rid of bindweed and wild mustard in the vicinity also helps.

Powdering your plants with diatomaceous earth is a good treatment for these insects.


The presence of rough or heavy soil is a common source of forked roots. This problem can be solved by removing rocks, branches, and garbage from the area and replacing them with a generous amount of well-aged compost and sand.

You may occasionally come upon lovely radishes with a small root bulb. When your radishes are seedlings, thin them out.

Excess nitrogen can also cause this problem, although if you use well-composted manure and compost, over-nitrification is rarely a problem.

A third reason could be that the temperature became too hot for your plants, preventing bulbing, or that they were put in too much shade.

You may have harvested your radishes too late or the soil may have become too dry during warmer weather if they are overly peppery or pithy.

It’s simple to avoid these problems. Water your plants frequently and deeply to keep the soil moist, and don’t leave it too long to harvest your bulbs.

If your soil doesn’t drain effectively, root rot can be a problem with radishes. Fungal diseases like root rot can wipe out your crop if your soil has too much moisture (read “wet”).

You can either add a lot of organic matter to your soil to increase drainage or rotate your crop to a different spot that drains well.

When your roots get bloated and stubby, a sort of “wet rot” develops. Your radishes’ leaves may turn yellow and remain little.

Raising the pH of your soil to 7.2 can help to eliminate this problem. Next season, move your plants to a new location.

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