Seed Swaps

Radish 'Crimson Giant'   

Raphanus sativus

  • 29 plantings
  • 3 available for swap
  • 1 wanted
  • 27 stashed

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

Large 3-4 inch (7.5-10 cm) globe shaped crimson roots with white flesh that does not turn hollow or pithy with extra size. The white flesh is crisp, firm and mild. Grows well in spring and fall.

Known as early as 1913, when it was introduced by the Ontario Seed Co, Waterloo Ontario, Canada.

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

Typically, Crimson Giant 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 Crimson Giant have been kindly provided by our members.

How to grow Crimson Giant

  • Full Sun

  • Medium

Once your radishes germinate, keep them watered as evenly as possible. Do not over water, but don’t let them dry out either.

Position in a full sun location and remember to water moderately. Keep in mind when planting that Crimson Giant is thought of as tender, so it is really important to ensure that the outside temperature is well above freezing before planting or moving outdoors. Use USDA Hardiness Zone 5 - 14 as your guideline for the appropriate climate for this plant. Crimson Giant requires a loamy, clay and sandy soil with a ph of 5.5 - 6.8 - it grows best in weakly acidic soil.

Growing Crimson Giant from seed

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

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

Transplanting Crimson Giant

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.

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

Harvesting Crimson Giant

This variety produces four to five inch round roots.

Expect harvests to start to occur in early spring.

Radish Crimson Giant Etymology

It is red and very large.