United States Edition

Radish

Raphanus sativus

Radish is a member of the Raphanus family. Its botanical name is Raphanus sativus. The scientific name epithet sativus means 'having been cultivated'.

Radishes are extremely variable. The most common varieties are grown for their edible roots, which can range in diameter from 1 inch (2.5 cm) to 8 (20 cm) inches, and in shape from globes to carrot shapes. Less common varieties have no edible roots, and are grown for leaves, seed pods or seeds.

Radish grows as an annual and is an edible vegetable. Being an annual plant, it tends to grow best over the course of a single year. Normally growing to a mature height of 15.0 cm (5.85 inches), Radish grows with a shrubby habit. Some varieties of Radish you may like to consider growing are: Cherry Belle, French Breakfast, Sparkler, Watermelon and Easter egg.

France is believed to be where Radish originates from.

Radish is normally fairly low maintenance and quite easy to grow, as long as a level of basic care is provided throughout the year. Being aware of the basic soil, sun and water preferences will result in a happier and healthier plant.

This plant info is provided by the myfolia gardener's wiki. All details about Radish have been kindly provided by our members.

How to grow Radish

  • Full Sun

    +
  • Medium

Radishes are generally free from pests, although some are troubled by flea beetles. They can be planted and allowed to go to seed near squash plants to deter squash bugs.
The secret to good radishes is plenty of even moisture. Supply sufficient water to plants without creating waterlogged soil. If allowed to dry out, radishes taste hot.
Plant in cool weather to avoid hot radishes.
Replant small crops every 2 to 3 weeks. Thin shortly after they emerge because they mature so quickly.

A full sun position will ensure your plant thrives and remember to water moderately. Zone 5 to 14 are typically the USDA Hardiness Zones that are appropriate for this plant (although this can vary based on your microclimate). Radish needs a soil ph of 5.5 to 6.8 (weakly acidic soil). Radish is generally regarded as a half hardy plant, so it will need protecting in periods of cold weather.

Growing Radish from seed

Radishes are very quick and easy to germinate, and no special attention is generally needed. If you are starting them extra early in spring, a warm water soak for 1-2 hours before planting will be helpful, but is not necessary.

Germination Time (Days)
29 days at 41° F
11 days at 50° F
6 days at 59° F
4 days at 68° F
4 days at 77° F or higher

Aim to sow 0.47 inches (1.2 cm) deep and try to ensure a gap of at least 0.99 inches (2.54 cm). For optimal germination, soil temperature should be a minimum of 13°C / 55°F.

By our calculations*, you should look at sowing Radish about 28 days before your last frost date .

Transplanting Radish

Radishes do not respond well to transplanting. Root and leaf varieties should be directly sown in stone-free soil in early spring to early summer, and again in late summer for fall crop. Pod varieties should be directly sown in warm weather. Make successive sowing every 2-3 weeks.

Radish is half hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.

Seed Saving Radish

Pull the plants when the seed pods turn yellow. Hang them in a dry place to cure. 1

Companion plants for Radish

These plants have been known to grow well alongside Radish so consider planting:

Beets, carrots, spinach and parsnips, cucumbers, lettuce and beans.

  • Radish Spinach

    Radishes will attract leaf miners away from spinach, they will eat the radish leaves but leave the root alone.

  • Radish loves Lettuce

    Lettuces planted near to radishes will make them more tender.

  • Radish Chervil

    Improves the growth and flavour of radishes.

  • Radish loves Cucumber

    Repels striped cucumber beetle

  • Radish loves Tomato

    Repels red spider mite

Repellent plants for Radish

These plants will not grow well with Radish so avoid planting these within close proximity:

Cabbage, cauliflower, brussels sprouts, broccoli, kohlrabi and turnip.

Common Radish problems

These problems, diseases and pests are known to affect Radish plants:

  • Flea Beetles
  • Cabbage Root Fly
  • Flea beetle

    A generic term for a wide range of small leaf-eating beetles with powerful back legs that allow them to leap large distances (hence the comparison with fleas).

  • Cabbage Root Fly

Radish Etymology

The botanical epithet is from the Latin sativus meaning “cultivated”

Radish Folklore & Trivia

According to the book 100 Vegetables and Where They Come From, written by William Woys Weaver, radishes were used in the 18th century treat the common cold, digestion problems, and kidney stones.

Other names for Radish

Cultivated radish, Fodder radish, Sprouting radish, Radish edible leaf, Rettich, Radishes, Chinese radish

Raphanus sativas

Latest Radish Reviews

  • 05 Jul 2014

    HollyBee HollyBee's Radish 'French Breakfast' was Reviewed day 42

    when these grew any size, they became hollow in the middle. According to Terry, they still tasted good. Try another kind next time.

    0 stars

  • 08 Apr 2014

    AAshleySEG AAshleySEG's Saxa II Radish was Reviewed day 48

    These radishes were really great! Fairly mild as radishes go, I used them in a couple different applications and they grew quickly for me. Will definitely plant them again…oh wait I already did!

    5 stars

  • 19 Jan 2014

    Frank_dv Frank_dv's Radish 'Rainbow mixed' was Reviewed day 31

    Fast, fun & easy to grow! The colors kept my friends and family talking, and the flavor was good (no pithiness and just slightly hot).

    5 stars

  • 06 Sep 2013

    Bojickwoman Bojickwoman's Radish "Le Bizzarre" mix was Reviewed day 158

    Nice color and flavor, easy to grow and fast sprouting. Radish are all very uniform in size and texture.

    5 stars

  • 16 Aug 2013

    Megan_H Megan_H's Radish 'Cherry Belle' was Reviewed day 12

    Rabbits decimated my nearby beans and peas, but left the “cherry belle” alone. THANK YOU! Looking forward to a nice harvest.

    5 stars

See all Radish reviews and experiences »

Radish care instructions

How long does Radish take to grow?

These estimates for how long Radish takes to sprout, grow and harvest are from real observations from real gardeners, right around the world. Start logging and journaling your observations to participate!

When should I plant Radish?

Our when to plant Radish estimates are relative to your last frost date. Enter your frost dates and we'll calculate your sowing and planting dates for you!

Footnotes

1 :The New Seed-starters Handbook; Published 1988

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