Seed Swaps


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.

Blooms normally display as a colour very similar to   Arylide yellow and   Light yellow and   Mellow yellow. When fully grown, they tend to grow to a diameter of 1.0 cm (that's 0.39 inches in imperial). The mature flowers take a single form, with an approximate petal count of 4. Leaves usually appear in   Forest green (web) and   Ao green

Radish grows as an annual and is a flowering 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. This plant tends to bloom in late spring.

Some varieties of Radish you may like to consider growing are: Cherry Belle, French Breakfast, Sparkler, Watermelon and Early Scarlet Globe.

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.
Neglected plants easily run to seed.

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 loamy, clay and sandy soil with a 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.

See our list of companion Plants for Radish to see which plants you should plant in close proximity to encourage growth.

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.
Sow thinly and thin seedlings to make room for them to grow properly

Radish is half hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside - as a guideline, the minimum temperature outside should be approximately 10°C / 50°F.

Harvesting Radish

Pull the radish as soon as they are ready to prevent them becoming woody or running to seed or feeding the slugs!
Take the plants that will leave room for other to develop further

Seed Saving Radish

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

Seed viability is five years.

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!

Days to Germination How long does it take Radish to germinate?
7 days

Average 7 days | Min 1 days | Max 24 days (1048)

Days to Transplant How long until I can plant out Radish?
+ 12 days

Average 12 days | Min 2 days | Max 35 days (21)

Days to Maturity How long until Radish is ready for harvest / bloom?
+ 29 days

Average 29 days | Min 7 days | Max 62 days (34)

Total Growing Days How long does it take to grow Radish?
= 48 days

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!

When to sow The number of days to sow Radish before or after your last frost date.
28 days before Last Frost Date

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. Radish is believed to be native to southern Asia2. The roots contain raphanin (an antibiotic compound), and vitamin C2. Herodotus (~485-425 BC) wrote that the builders of the ancient Egyptian pyramids were paid in radishes, onions and garlic2. Radish oil was used in ancient Rome to treat skin ailments2. In Chinese medicine, it is listed as a digestive stimulant2.

Other names for Radish

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

Raphanus sativas

Latest Radish Reviews

  • 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

    HollyBee about growing Radish 'French Breakfast'
  • 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

    AAshleySEG about growing Saxa II Radish
  • 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

    Frank_dv about growing Radish 'Rainbow mixed'

See all Radish reviews and experiences »


1 :The New Seed-starters Handbook; Published 1988

2 :The Encyclopedia of Medicinal Plants: A Practical Reference Guide to over 550 Key Herbs and Their Medicinal Uses; Andrew Chevallier; published 1996

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