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Sparkler White Tip heirloom radishes come from the Dutch and French tradition of delicate, round spring radishes. Though their exact date of introduction to North America is not known, they have been cultivated in Canada since at least 1937 when Sparkler White Tip radish seeds were advertised in the McFayden Catalogue.

Sowing: Direct sow the first crop of radish seeds in rich soil, about four weeks before the last expected spring frost. Plant them in deeply worked up soil about 1/2″ deep and 1″ apart; later, thin the seedlings 2-3″ apart or more for larger radishes. For a continuous harvest, plant a new crop every two weeks. Since most radishes do not tolerate heat well, it is best to avoid planting them in the heat of midsummer. For a fall crop and winter storage, plant radish seeds about two months before the first expected fall frost.

Growing: Radishes do well with consistently moist soil and the addition of organic matter such as compost. Do not allow the soil to dry out, but also avoid overwatering as this can cause splitting.

Harvesting: This variety tastes best when harvested at 1″ in diameter. Sparkler White Tip radishes have a sweet flavor.

Seed Saving: Radishes will cross pollinate with all other varieties of radish, and must be isolated by at least half a mile from other varieties to protect genetic purity. Allow the radish plant to fully mature and send up a flowering stalk; the pods will form and turn from green to brown. Pick the brown pods and allow them to dry for several days. Thresh out the seeds by opening the pods by hand, or by applying pressure to crush them. Store the seeds in a cool, dry place for up to five years.

Latin Name: Raphanus sativus

Type: Open Pollinated, Heirloom, Cool Season

USDA Zones: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Seeds per Ounce: 2,500

Planting Method: Direct Sow

Sunlight: Full Sun

Height: 9 Inches

Color: White, Red