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Radish: sowing, cultivation, maintenance and harvest

The radish comes in many varieties, which makes it possible to cultivate different shapes, sizes and colors but also to taste radishes with various flavors. Easy to grow and fast growing, radish is ideal for beginner gardeners. Let’s take stock of the sowing, transplanting, maintenance and harvesting of this root vegetable.

Sow radishes

According to the varieties chosen, the sowing is staggered mid-February to September. It is indeed possible to sow radishes very early on condition that they can be protected by a forcing sail because they fear freezing. Either way, this root vegetable can only germinate if the soil temperature is above 8 ° C but it is highly preferable for it to reach at least 12 ° C to facilitate its growth. As for the air temperature, it should be around 16 ° C. It is therefore recommended that gardeners wait until ideal conditions are reached before sowing their radishes.

We must observe a distance of 20 to 35 cm between rows depending on the variety cultivated since the more the roots gain volume, the more the rows must be separated from each other. For information, there are 20 round radish seeds per square meter and around 30 for the medium ones. About the depth to respect, it is between 1 cm for the first and 2 cm for the latter.

All seeds should be covered with a thin layer of fine earth and it is imperative to keep the soil moist for the next 5 days, which is sufficient time for radishes to begin to emerge if sown in full ground, but they can be seen showing the tip of their nose after only 3 days under frame.

As soon as the outside temperature reaches 24 ° C, it is imperative to remove the protective sails.

Growing radishes

Radish likes very bright and sunny situations, but in the height of summer, when it is very hot, it enjoys a slight shading that we can offer it by growing it near fairly large leafy vegetables because they will keep it cool. As to ideal soil, it must be very worked so particularly furniture, well drained and fresh.

One to two weeks after sowing, a thinning. This consists of keeping only one plan every 14 cm for the larger varieties and one plan every 4 cm for the smaller ones.

Caring for radishes

The radish germinates very quickly and grows just as fast without the need to spend a lot of time maintaining it. Here is what you need to do to taste good radishes from the garden all year round.


It must be ensured that watering be regular because radishes fear drought, but always very moderate because they don’t like excess water. In summer, the correct frequency is twice a week but we reduce to watering every 6 days in autumn except in case of drought of course.

The regularity of the waterings is the secret to limit the attacks of certain parasites, to prevent the roots from becoming hollow but also to obtain non-spicy radish. In other words, if a radish stings it is because it has run out of water. We can opt for a mulch which keeps the soil cool.


Only poor soils should receive fertilization before sowing. Otherwise, the radish does not need special fertilizer.

Parasites and diseases

What we dread the most isflea beetle, a pest which can wipe out all the radish seedlings in no time. The impact is direct on their development since the leaves are riddled with holes in the event of an attack, a sign that testifies to the presence of this small black chip devouring. Hence the interest of placing a forcing veil on the seedlings, an effective mechanical protection solution that is less expensive than the anti-insect veil. The downside is that the former must be removed quickly to avoid overheating the seedlings while the latter can be left in place longer.

In addition to this veil protection, we take care of wet the leaves at each watering to keep the flea beetles away.

Harvest your radishes

If we thought of stagger its seedlings and plantations, you can harvest your radishes from the end of March until November since you only need 21 to 28 days so they’re ready to eat. Although it is advisable to harvest the radishes as and when needed, care must be taken not to leave them too long in the ground because they will only widen. Finally, it is absolutely essential that they are all harvested before frost.

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