Shiro

Family: Brassicaceae Root Vegetable

Silky and luminous, Shiro daikon forms long, tapered roots with a clean, ivory-white glow and a crisp, juicy snap.

Its flavor is notably mild and sweet at harvest, with a delicate radish bite that stays pleasantly restrained—ideal for bright, fresh preparations and quick pickling where it turns wonderfully crisp. Grow Shiro for a dependable 60-day rhythm and a harvest that looks as refined as it tastes, from garden to jar.

Light: Full SunMaturity: 60 DaysHabit: Taproot

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 25th
Harvest Begins	Jun 24th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	60
Sun Requirements	Full Sun
Growth Habit	Taproot
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	75
Min Soil Temp (°F)	40
Min Night Temp (°F)	28
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Shiro daikon is built for restraint: its restrained radish bite and glassy, juicy crunch make it ideal for fast pickling and razor-thin shaving, where the texture is the headline. Use it with salty-sour agents like soy, vinegar, and miso so it perks up instead of fighting the dressing.

Best Uses

quick pickles where it stays crunchy in the jar
shaved or julienned raw salads for a cool, snappy crunch
lightly dressed noodle bowls or rice sides (won’t overpower)
stir-fries or quick sauté to soften without turning mushy

Flavor Profile

mild, sweet radish edge crisp, juicy snap silky, tender bite (less pepper than hotter radishes) clean, refreshing finish

Kitchen Pairings

soy sauce rice vinegar sesame oil ginger chili crisp miso

Frequently Asked Questions

What is a common disease or pest for Raphanus sativus (radish) and how can I address it?

Flea beetles are a frequent problem on radish (Raphanus sativus), causing small shot-holes in leaves and stunting. Cover seedlings with row cover immediately after sowing, and control outbreaks by removing heavily damaged plants and keeping weeds down. If needed, use an insecticidal soap spray in the evening and repeat every 5–7 days while beetles are active.

How often should I water Raphanus sativus during the main growing phase?

During the 30–45 day period when roots are swelling, keep the soil consistently moist but not soggy—aim for evenly damp ground like a wrung-out sponge. Water whenever the top 1 inch of soil dries, typically every 1–2 days in warm weather, and reduce frequency if the soil stays wet. Irregular watering can cause pithy, woody roots and splitting.

How do I tell when Shiro radish (Raphanus sativus) is ready to harvest?

Harvest when the roots reach the size typical for your seed packet and before they get over-mature (usually around 55–60 days). Check by gently pulling one plant and looking for a firm, crisp root with good fullness at the shoulders. If the root is soft, overly elongated, or the plant bolts early, harvest immediately to avoid quality loss.