How to Grow Hailstone Radish
Hailstone Radish
Raphanus sativus var. sativus
vegetableHailstone is a round, white radish variety known for its crisp texture and mild, slightly sweet flavor. It matures quickly, typically in 25-30 days, making it ideal for succession planting and quick harvests. The small, marble-sized roots are perfect for fresh eating, salads, and garnishes.
When should you plant Hailstone Radish in your zone?
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Example Hailstone Radish timeline · Pittsburgh, PA (Zone 6b)
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Plant Hailstone Radish
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Hailstone Radish
Around May 12≈ 25 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Hailstone Radish dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-10; grows best in cool seasons (spring and fall)
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Germination
3-5 daysSeeds sprout and first tiny leaves (cotyledons) emerge above soil
Keep soil consistently moist; germination occurs in 3-5 days at 60-70°F. Thin seedlings to proper spacing once they have true leaves.
Seedling/Early Growth
7-10 daysTrue leaves develop; small root begins expanding underground
Thin to 2 inches apart to prevent crowding. Remove weeds carefully. Water evenly to prevent root splitting.
Root Development
10-15 daysRadish bulb swells underground; plant remains relatively compact above soil with 4-6 leaves
Maintain consistent soil moisture. Weed regularly to reduce competition. Watch for pests, particularly flea beetles.
Maturity/Harvest Ready
Ready to harvestRoot reaches 0.75-1 inch diameter (marble-sized), white and crisp; shoulders may peek through soil
Check readiness by gently brushing away soil to see bulb size. Harvest promptly to prevent woodiness and cracking.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use row covers until flowering stage; apply neem oil or insecticidal soap; dust with diatomaceous earth
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Use row covers; apply beneficial nematodes to soil; wrap stem base with radish-stem collar
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Spray with water to dislodge; apply insecticidal soap; introduce ladybugs
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Hand-pick; apply Bacillus thuringiensis (Bt); encourage natural predators
Uses
Fresh Salads & Raw Eating
CulinaryHailstone radishes are prized for their crisp texture and mild flavor, perfect for fresh eating, salad toppings, and vegetable platters. Their small, uniform size makes them attractive garnishes. [source]
Roasting & Cooking
CulinaryDespite their fresh-eating reputation, Hailstone radishes can be roasted, pickled, or braised. Cooking mellows their peppery notes and creates a buttery texture. [source]
Digestive & Antimicrobial Support
MedicinalRadishes contain glucosinolates and sulfur compounds traditionally used to support digestion and immune function. They may have antimicrobial and antioxidant properties. [source]
Seed Production & Garden Succession
HouseholdHailstone radishes mature so quickly (25-30 days) they are ideal for succession planting every 2-3 weeks, providing continuous harvests throughout the growing season. [source]
Pollinator & Beneficial Insect Support
WildlifeRadishes allowed to bolt produce small white flowers that attract pollinators and beneficial insects. These can be left to bloom to support garden ecosystem health. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest when radishes are 0.75-1 inch in diameter, typically 25-30 days after planting. Hailstones mature quickly and should be harvested promptly to avoid becoming woody or cracking. Pull by grasping the crown and gently tugging; you can also loosen soil with a fork first. Harvest in early morning for crispest texture. Can be harvested as soon as they reach usable size.
Fun Facts
- 🌱 Hailstone radishes are named for their small, round, white appearance resembling hailstones. They originated in Asia, where radishes have been cultivated for over 3,000 years.
- 🌱 Radishes are one of the fastest-maturing garden vegetables, with Hailstone reaching harvest in as little as 25 days—faster than many salad greens. This makes them excellent for teaching children about gardening.
- 🌱 The crisp texture of radishes comes from high water content (95%) and cellular structure that develops best with consistent watering and cool temperatures. Inconsistent water causes the flesh to crack and become pithy.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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