Seed Swaps

Radish 'Watermelon'   

Raphanus sativus

  • 75 plantings
  • 7 available for swap
  • 15 wanted
  • 89 stashed

Watermelon is part of the Raphanus genus and is a Radish variety. Its scientific name is Raphanus sativus 'Watermelon'. Watermelon is a heirloom (open pollinated) variety. This variety typically produces fruit in the following colours:   White and   Cerise pink.

This 3 inch (7.5 cm), round Chinese radish is red on the inside and green/white on the outside, with a unique juicy sweet taste. It is for summer to fall sowing only and will bolt if sown in spring.

An annual, so it will last but a year in its native climate. Normally grows to a mature height of 15.0 cm (5.85 inches).

China is believed to be where Watermelon originates from.

Typically, Watermelon Radish is normally fairly low maintenance and can thus be quite easy to grow - only a basic level of care is required throughout the year to ensure it thrives. Being aware of the basic growing conditions this plant likes (soil, sun and water) will result in a strong and vibrant plant.

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

How to grow Watermelon

  • Full Sun

  • Medium

Water evenly — dry spells with cause it to get hot and pithy.

Enjoys a full sun position in your garden and remember to water moderately. Keep in mind when planting that Watermelon is thought of as half hardy, so remember to watch your frost dates and ensure you have this plant protected when the temperature dips. Use USDA Hardiness Zone 5 - 14 as your guideline for the appropriate climate for this plant. Watermelon requires a loamy, clay and sandy soil with a ph of 5.5 - 6.8 - it grows best in weakly acidic soil.

Growing Watermelon from seed

Ensure a distance of 0.98 inches (2.5 cm) between seeds when sowing - look to sow at a depth of approximately 0.47 inches (1.2 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

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

Transplanting Watermelon

Do not transplant. Sow in mid-to-late summer for Fall harvest. Watermelon radish is day-length sensitive, and will bolt if sown in spring. Thrives in cool weather.

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Watermelon is a half hardy plant.

Harvesting Watermelon

Radish Watermelon Etymology

Heirloom from China, developed for ornamental red interior.

Misspellings of Radish 'Watermelon'

Red flesh, Red meat, Matan hong, Matang hong

Other Names for Radish 'Watermelon'

Beauty heart, Mantang hong, Chinese red meat, Watermelon

Latest Radish 'Watermelon' Reviews

  • I only gave these one star for the time being. They got a very late start this year and so by the time they were ready to be pulled the were so spicy our mouths couldn’t handle it! They did grow very well for me though even in summer heat. Will plant agai

    1 stars

    AAshleySEG about growing Watermelon Radish

See all Watermelon reviews and experiences »