When to harvest radish seeds?

About Radishes (Raphanus sativus)

The genus name for this vegetable, Raphanus, comes from the Greek for “quickly appearing,” and it’s wholly appropriate. Radish seeds can germinate in as little as three days, and be ready for eating in under four weeks from planting, so they really are the speed demons of the vegetable garden. The whole plant is edible, although the leaves can be tough and bitter tasting. Most people grow radishes for the crunchy, sometimes spicy roots. Here are some other fun facts about radishes.

Radishes are members of the Brassica family, and their original wild form can still be found from western Asia to the Mediterranean region, where it grows alongside its cousins, turnip and mustard. Radishes have been cultivated in China for 3,000 years and in Europe prior to the time of the Greek empire. Certainly, by the 1500s, several named varieties were being cultivated in France and elsewhere in Europe, and some of these heirlooms remain on the market today.

Writing in the early 17th century, the physician Nicholas Culpepper didn’t seem to think much of the radish:

Garden Rhaddishes are in wantonness by the gentry eaten as a sallad, but they breed but scurvy humours in the stomach, and corrupt the blood, and then send for a physician as fast as you can; this is one cause makes the owners of such nice palates so unhealthful; yet for such as are troubled with the gravel, stone, or stoppage of urine, they are good physic, if the body be strong that takes them; you may make the juice of the roots into a syrup if you please, for that use: they purge by urine exceedingly.

In truth, radishes are high in ascorbic acid, folic acid, and potassium, as well as vitamin B6, riboflavin, magnesium, copper, and calcium.

Radishes may be round or elongated, and they come in a wide range of colours, although the interior flesh is always white. Round Black Spanish is an old heirloom variety dating back to 1548. It grows to a much larger size than the small red, pink, or white varieties, and has rough, dark brown to black skin over its roots, with a hotter flavour. The daikon (R. sativus var. longipinnatus) is a very large, elongated, white radish from Asia that grows to 35cm (14”) long. Though many people think of daikon as a Japanese radish, it originated in China. Interestingly, the Chinese word for carrot translates literally as “giant foreign radish.”

On the 23rd of December each year in Oaxaca, Mexico, the Noche de Rabanos (Night of the Radishes) marks an important point in Christmas celebrations. Locally grown giant radishes (some weighing 10 lbs!) are carved into figures of saints, conquistadors, and revolutionary heroes, as well as animals and scenes depicting the Nativity. These go on display in the zocalo, and are rated for quality. The winner of the competition gets a cash prize and local fame. The origins of this festival remain unclear, but the first radish art competition was inaugurated by the mayor of Oaxaca back in 1897.

How to Grow:

Difficulty: Easy. Radishes work well in large containers.

Timing: Radishes can be grown all season, but they’re easiest when sown March/April and again August through October. In the heat of summer, try growing some in partial shade.

Sowing: Direct sow 2cm (¾”) deep, 25 seeds per 30cm (12”) in rows spaced 20cm (8”) apart, and thin to 10-12 plants per 30cm (12”).

Soil: Moderate to heavy feeders. Best in rich, loamy soil amended with composted manure. Add 4L (1 US gallon) of complete organic fertilizer for 10 sq m (100 sq ft) of bed for background fertility. Lime beds in fall, before planting, to bring the pH to 6.0-6.8.

Growing: The real secret to growing this little vegetable is speed. Sow a short row frequently, thin them quickly, keep them watered, eat them quickly, and sow some more. Winter radishes need to stay in the ground much longer, where they will stay fresh until eating.

Harvest: Harvest promptly when radishes are the size of marbles. Leaves and developing seed pods are also tasty. Harvest seed pods while they are still green.

Storage: Radishes do not retain their crisp, appealing texture for long after harvest, so eat them fresh.

Seed info: At least 80% of seeds will germinate in optimum conditions. Usual seed life: 4 years.

Growing for seed: If growing for seed, each variety should be isolated by 1km (½ mile).

Pests & Disease: Root maggots and flea beetles can be a problem. Expect to lose 20-30% of your crop to maggots if you don’t use a floating row cover.

I love radishes… love, love them! They add spicy deliciousness to my salads, and are super easy and fast to grow too. They are one of my favorite types of vegetables to collect seeds from. Saving radish seeds from the garden is a no brainer, and is a great way to save yourself some cash!

In order to produce seed, radish plants must first bolt (i.e.: flower) first. So, if you’re interested in saving radish seeds, you have to plan on sacrificing some of your harvest – which is unfortunate, but think of all the new radish plants you’ll be able to grow next year.

Once a radish starts to bolt, it will no longer be edible. Don’t worry, you will get lots of seeds from one plant, so you don’t need to sacrifice too many radishes.

Collecting Radish Seeds From The Garden

How to Save Radish Seeds From The Garden

Once the radish flowers fade, you will notice seed pods starting to form. Radish seed pods look similar to a small bean. Allow the seed pods to dry on the plant, the pod will turn brown. Radish seeds are ready to harvest when you can hear the seeds rattle around in the pod when you shake it.

Related Post: Collecting And Storing Bean Seeds

Collect radish seeds before the pods start bursting open, otherwise the seeds will be lost. To collect radish seeds, use a clipper to cut the pods off the stem and drop them into a bucket or bag. Radish seeds are easy to separate from the seed pod.

Gently break apart the seed pod and the seeds will fall out. Radish seeds are oval shaped and slightly larger than a sesame seed. The color of the seeds varies depending on the variety; anywhere from tan to dark brown.

Storing Radish Seeds From The Garden

You can plant radish seeds as soon as you harvest them, or you can store them in a plastic container, paper bag or small coin envelope until spring. Just make sure they are completely dried out before storing seeds. Learn how to make DIY seed packet envelopes.

If you don’t have radishes growing in your garden, here are some great, quality seeds you can buy to get started… cherry radish, white radish, French Breakfast and Watermelon radish.

Next, learn how to grow radishes from seed.

More Posts About Saving Vegetable Seeds

  • Collecting And Storing Bean Seeds
  • Collecting and Storing Lettuce Seeds
  • Free Garden Seeds: How To Save Seeds From Your Garden
  • Collecting and Storing Pea Seeds

Do you collect any seeds from your garden? Tell me your favorites in the comments below.

Radish is considered the most common element of salad. Radish, referred to as Raphanus sativus scientifically, is definitely an edible root vegetable that belongs to the family Brassicaceae. It’s got sweet or even stinky flavor along with abundant of juice.There are many different types of radishes, based upon their color, size and time period of cultivation time. Radishes could be white, black, purple or red in color and long, round or even cylindrical in shape. A few radishes are grown because of their seeds, whilst oilseed radishes are grown for oil production. Radish seeds are delicious and could be included with salads for the crispy, spicy taste.Because of therapeutic qualities of seeds, some types of radishes are especially grown for the seeds or even seed pods. Radish seeds are sprouted as well as consumed much like other sprouts. Seed extract may also be used.

Health Benefits of Radish Seeds

Radish seeds or even daikon seeds have been utilized for hundreds of years to deal with numerous health issues. They assist to cure indigestion, decrease fatigue as well as cleanse blood and body. They may be efficiently utilized to cure migraine headache, sore throats, edema, congestion and hangovers. They are also beneficial for bloating, diabetes, acne and cellulite. Radish seeds are helpful to improve immune kidney function, boost immune system as well as boost the circulation of blood. Radish seed oil is utilized to heal as well as soften dry, cracked skin.

Listed here are some well-liked health advantages of Radish Seeds:

1. Wonderful Detoxifying Agent

Radish seeds are excellent detoxifying agents which help in eliminating the damaging toxic materials and free-radicals through the body.

2. Control Blood Pressure

The potassium content of radish seeds works well for reducing down the blood pressure level. Potassium works well for dialating the blood vessels which often energizes the normal blood circulation within the body. Therefore it’s better to include radish seeds in your daily schedule to manage the problem of high blood pressure levels.

3. Improving digestion

Radish is a superb natural source of fiber. This and also the herb’s anti-inflammatory qualities allows it to help your digestive system. Radish seeds assist reduce indigestion as well as bowel problems. By extension, these effects help with the management of hemorrhoids.

4. Rich In Fibre

Radish seeds are full of fibre content which will help in stimulating the entire digestive health. Regular usage of radish seeds works well for dealing with lots of digestive problems which includes constipation. It is therefore preferable to include radish seeds in your routine to enhance your digestive health.

5. Assisting the treatment of diabetes

Radish seeds can affect the rate of blood sugar absorption. The effect is potent enough to be a significant help to diabetics.

6. Lowers The Risk Of Heart Disease

Radish seeds are full of flavonoids which help in lessening numerous cardio vascular illnesses. Regular usage of radish seeds is extremely beneficial in managing the problem of arteriosclerosis. Additionally, radish seeds consumption is extremely valuable in decreasing the chance of heart attack too. As a result it could be smart to include radish seeds in your daily schedule to obtain the advantages.

7. Prevents The Risk Of Cancer

Radish seeds might be among the best methods to avoid the risk of cancer. Research indicates that radish seeds can deal with lots of cancer which includes colon, kidney, oral, intestine and stomach cancers. The anti-oxidant, vitamin C and folic acid content of radish seeds limit the activity of free-radicals and stop the development of cancer cells. Include radish seeds in your routine and stop potential risk of cancer efficiently.

8. Treats Skin Problem

The vitamin B, vitamin C, zinc as well as phosphorus content of radish seeds works winder for the skin and helps in lessening lots of skin problems just like dry skin, rashes, cracks etc. Additionally, usage of radish seeds works well for moisturising the skin from inside and increases the all round skin health.

9. Beneficial for Bones

Radish seeds are full of calcium that is necessary for the overall bone health. Regular usage of radish seeds works well for strengthening the bones and treats lots of bone related difficulties.

10. Good for Jaundice

Radish seeds are extremely beneficial in treating the problem of jaundice. The natural content of radish seeds works well for preventing the problem by removing bilirubin that is in charge of the problem. In addition, usage of radish seeds also encourages the activity of red blood cells by increasing the oxygen supply to them.

11. Kidney Stones

The intake of radish seeds assist in dealing with the problem of kidney stones. Radish seeds due to their diuretic properties assist in dissolving the stones. In addition, radish seeds may also be very useful in clearing the urinary bladder as well as stimulate its functioning. Regular usage of radish seeds is additionally suggested since they assist in enhancing the bowel movement as well as treats problem just like diarrhoea.

12. Cleansing your liver

The liver is really a natural filter which safeguards our bodies. The toxins from food and environment poison it and lower the efficiency of the filter. Radish seeds remove overabundance of bilirubin from the liver and control its production. Additionally they flush harmful toxins from your body. As a result, they may be utilized in a treatment program for jaundice as well as for detox.

Radish Seed Description and History

Lai Fu Zi, since they are recognized in Mandarin, aren’t just essential for growing radishes, but additionally play a vital role in traditional medicine, just as one herb that will help the body heal from numerous problems, like indigestion. Growing in all Chinese provinces, this particular plant has become famous within the 19th century, when Zhang Xi Chun, a world-known physician discussed the advantages of the seeds. After that, radish seed have been grown as well as gathered throughout the summer, together with the reason for being used in a variety of alternative medicine treatments.

The radish seed is acquired by drying the fruits of the plant, rubbing them, as well as cleaning them of all impurities. Once this process is conducted, the seeds are once again let to dry, and could be utilized roasted or raw. The key is to completely smash the seed before utilizing it for decoct. The radish seed consists of fatty oils which help the body function properly, remain healthy as well as fit.

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Growing Radishes

My favorite thing about growing radishes is that they provide almost instant gratification. They are the fastest plant in my garden to go from seed to salad bowl. The time between when I put the seeds in, to the time I pluck the radishes out, is only about 3 or 4 weeks!

Because they are so fast growing radishes should be planted every 10 days or so throughout the spring, and then again from mid-to-late summer through fall. Like other cabbage family crops, when it gets hot in the middle of the summer, radishes will bolt, or send up a flower stalk. So grow them at both ends of the season.

Plant them about a ½ deep and 3” apart for ordinary radishes. I always plant two seeds per hole at their final spacing, and then thin by pinching off the smaller of the two seedlings. For spacings on the huge or specialty varieties, you’ll have to read the seed packet.

For a Sustained Harvest

I learned the hard way not to plant too many radishes at once. How many radishes do you think you’ll eat in about 10 days? Only plant that many in the first planting, then about 10 days later plant that many again (further down the bed). Then again in ten more days, do the same thing one more time. In about a month, you can begin three sequential harvests of radishes. Then…

From there on out for the remainder of the spring, take a few seeds and a little recycled yogurt carton full of compost out to the garden every time you go out to harvest. After you pull out a few radishes, shake off the dirt, put a teeny bit of compost in the holes, and plant replacement seeds. This will help prevent using a bunch of garden space for tough old radishes that are going to seed because you just couldn’t eat them as fast as they matured.

You’ll be able to see where you last harvested and planted by the size of the plants. Get a nice big garden photography calendar to hang up and remind yourself when your different garden tasks (like sowing radishes) are due. This technique, with different timing, works for other crops too. I use it for other fast growers like spinach and even lettuce.

Radishes come in huge variety of sizes, colors and shapes, and it is fun in the winter to browse through the seed catalogs to find odd-shaped or fancy colored ones to try. I like to grow an old standby variety as well as try a new one each year just for fun.

How to Make Your Radishes Happy

Radishes are in the cabbage family, and they like some of the same things that cabbages do, which means growing radishes in loose, fertile soil (translate: lots of compost) with a slightly acidic pH.

Most people don’t want to have to mess with their garden’s pH, and if that is you just know that plenty of compost will do wonders for moderating it if it is a bit too high or too low.

If plants in general in your garden fail to thrive, grow with funny colored leaves or are just stunted, I would recommend a soil test at your local state university extension service. Once you know what is out of whack, you can correct it using the appropriate organic fertilizer if necessary. Normal limits for soil pH are about 6.0 to 7.5. Radishes like it best somewhere below 7.

Radishes need to be harvested on a regular basis, when they are about as big as a cherry (although this depends on your variety). If you don’t pull them just before or at maturity, they will get tough and pithy and they may crack down the side.

Special Tips for Growing Radishes

If you have a small garden and are short on growing space, growing radishes between slower-growing crops like lettuce works well because radishes are so fast they can be harvested before the lettuce even realizes it has competition.

Nitrogen fertilizer or high-nitrogen compost tends to encourage leaf growth, a good thing if you’re growing cabbage, but not so much if you’re growing radishes. Even though they’re in the cabbage family, they are a root crop, so don’t give radishes as much nitrogen as leaf crops.

When the weather gets hot, radishes do too, so if you like ‘em hot like horseradish, let them grow into summer. (Unfortunately, though, they will also get tougher.)

Bugs and Other Strangers

The same bugs that bother cabbages also bother radishes: flea beetles (especially when they’re little), cabbage root maggots, and leaf miner. You can avoid all of these by growing radishes under a floating row cover like Reemay, which physically prevents access to the plants by the bugs. Reemay also helps a lot if you live in an area that gets hailstorms in June, like we do.

If your radishes look like they’ve been chewed on the surface, it’s probably cabbage root maggots. Once they are in the soil, there’s not much you can do about it. Mice will also chew radishes, and they cause more damage.

So, have fun growing radishes! Come back and visit me often, for tips and advice on all aspects of vegetable gardening, learning how to compost, the latest tool reviews and more.

Blessings on your garden!

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Radish (Raphanus sativus) is a member of the Brassica family, along with cabbage and other cole crops. Radish is a very old crop, possibly important as early as 5,000 years ago. Present-day radishes include European radishes with relatively small roots as well as the large-rooted white daikons that are enjoyed both as food and, recently, as a cover crop, due to long taproots that can penetrate compacted soil.

Radish grows very quickly, maturing in 21-28 days under ideal conditions. The roots (technically swollen hypocotyls and roots) are spicy, due to the presence of glucosinolates, which are sulfur-containing compounds produced by members of the Brassica family. High temperatures and a lack of moisture can increase both pungency and the speed of bolting. As a result, production in the spring and fall often results in higher quality radishes than those produced in the summer. Some varieties also have a tendency to become pithy, possibly in response to certain environmental conditions.

Types and Varieties

Table radishes come in an array of shapes (round, cylindrical, turnip-like) and colors (white, green, shades of red, and black). Daikon is a general term for a group of long, white radishes that need cool temperatures and short day lengths to flourish. Some of these can grow up to 18″ long and weigh about 3 lb on average, but can reach almost 50 lb. The black or winter radish is intensely hot. The tuber of this biennial plant is formed from the basal part of the main shoot and a portion of the root. Shape, size, and skin color vary widely.

Radish Varieties
Small, Round Slender
Altaglobe d’Avignon (red and white)
Champion French Breakfast (red and white)
Cherriette White Icicle (white)
Cherry Belle
Early Scarlet Globe Daikon
Fireball Discovery
Fuego Summer Cross No. 3
Rover April Cross
Ping Pong (white)
Nero tondo

Soil Fertility

Apply lime according to soil test results to maintain soil pH at 6.0-6.8. Radishes need loose, well-drained soil for easy root expansion. Although daikon can penetrate heavy soils to depths more than one foot, the roots will not be smooth, uniform and tender in heavy soils. In stony or very heavy soil, shorter daikon varieties perform better. Because radish grows so rapidly, a rich, fertile soil is essential. They prefer cool growing conditions (50º-65º F), so maintain a high level of soil moisture to minimize the adverse effects of summer. Hot weather reduces quality and increases pungency. Late plantings may bolt before edible roots form.

Less nitrogen fertilizer will be needed if legume sod was plowed down or if manure was applied (see Table 1, page 2 and Table 7, page15).

Broadcast and Incorporate 50 150 100 25-50 0 125 100 50 0-25
TOTAL RECOMMENDED 50 150 100 25-50 0 125 100 50 0-25


Seeding rate for table radish is 18-38 lb of seed/A (depending on variety); 1.4 oz/100 ft row. Seeding rate for daikon radish is 1 lb/A.

In the spring, plant as soon as the soil can be worked; thereafter, plant at intervals of about 10 days. Soft, well-tilled ground will result in the most attractively-shaped radishes. Radishes are often planted in 4′ wide raised beds, 6 rows per bed. Use of floating row covers at time of planting will help control flea beetles and cabbage root maggots. Keep moist, especially if growing in hot conditions.

Harvest and Storage

Yield: A good yield of bunched table radish is 2,500 dozen bunches (8-12 radishes/bunch) per acre (about 25 bunches per 30 ft of row). A good yield of film packed radishes (8 oz. bags) is about 15-20 bags per 30 ft of row. Daikon may be marketed in cartons or 20 lb plastic bags at 15-20 tons/A.

Table Radishes:

Harvest on time, beginning at about 3-4 weeks when roots are the size of a large marble (depending on variety). Bunch or top, hydrocool, and refrigerate. Topped radishes will keep 3-4 weeks in good, crisp condition if kept at 32º F, 95% RH, and in breathable packaging.

Daikon Radishes:

Harvest by hand beginning approximately 60 days after planting. The roots are harvested at about 12″-14″ in length for the processing market and 2.5″ for the oriental vegetable market. Daikon can be sold with or without the tops attached; usually a better price is paid for tops left on the roots.

To store, bunch or top, hydrocool, and refrigerate. Topped radishes will keep 3-4 weeks in good, crisp condition if kept at 32º F, 95% RH, and in breathable packaging. Daikon will last 3-4 months in the same conditions.

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