United States Edition

Radish 'Helios'  

Raphanus sativus

'Helios' is a Radish variety in the Raphanus genus with a scientific name of Raphanus sativus. Helios is a heirloom (open pollinated) variety. When ripe, fruit appear in these approximate colours:   Yellow.

Bright yellow roots with white flesh are olive-shaped, and grow to 2-3 inches (4-7.5 cm) in size. They are sweet and mild. This heirloom came from Alzbeta Kovacova-Pecarova of Kosice, Czechoslovakia. Grows well in both spring and fall.

It is an Vegetable and is treated mainly as a Annual, This means that it grows best over the course of a single year. Normally grows to a mature height of 15.0 cm (5.85 inches).

Czech Republic is believed to be where Helios originates from.

Helios Radish is normally fairly low maintenance and is normally 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 'Helios' have been kindly provided by our members.

How to grow Radish 'Helios'

  • Full Sun

  • Medium

Once your radishes germinate, keep them evenly watered. They will become hot and unpleasant if they dry out.

Position in a full sun location and remember to water moderately. Keep in mind when planting that Helios is thought of as tender, so it is really important to plant out well after your last frost date. Use USDA Hardiness Zone 5 - 14 as your guideline for the appropriate climate for this plant. Ideally plant in loamy, clay and sandy soil and try to keep the ph of your soil between the range of 5.5 and 6.8 as Helios likes to be in weakly acidic soil.

Growing Helios from seed

Sow at a depth of approx. 0.47 inches (1.2 cm) and aim for a distance of at least 0.98 inches (2.5 cm) between Radish plants. Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

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

Transplanting Helios

Do not transplant. Sow in stone-free soil in early spring to early summer, and again in late summer for fall crop (if desired). Thrives in cool weather. Make successive sowings every 2 weeks. The recommendation for most root radishes is to directly sow them 4 weeks prior to your last frost date. However, you can start sowing as soon as the ground has thawed and air temperatures are averaging over 40 degrees on most days. Depending on what your springs are like (short and fast, long and drawn out), these conditions may emerge much sooner than or much later than the 4 week guide might suggest. Don’t be afraid to experiment with your start date. Cloches can be used for extra-early plantings.

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

Harvesting Helios

Radish 'Helios' information

How long does Helios take to grow?

These estimates for how long Radish 'Helios' 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 sow Helios?

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

Radish Helios Etymology

Helios is the Greek god of the Sun. These bright yellow, round radishes are named after the sun!

Misspellings of Radish 'Helios'



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