SproutSmart
SproutSmart Intelligent Garden Sowing

Shunkyo

Radish
Botanical illustration of Shunkyo
🌱 45d to harvest Taproot

Crisp as glass and bright as spring—Shunkyo radish delivers a clean, peppery snap with a sweet, fresh finish. At about 45 days, i…

Planting Schedule

Add Shunkyo to your garden to build a schedule and get reminders.

Crop Dates

MilestoneDate
Start IndoorsDirect Sow
Last FrostJan 1st
Transplant / Sow OutdoorsJan 1st
Harvest BeginsFeb 15th
Harvest EndsDec 31st

Crop Details

TraitValue
Days to Maturity45
Sun RequirementsFull SunFull sun
Growth HabitTaproot
Support NeededNone
Planting DepthNormal
Germination Temp (°F)50
Min Soil Temp (°F)40
Min Night Temp (°F)28
Harden Off (days)Not Required

Frequently Asked Questions


What pest or disease is most common on radish (Raphanus sativus) and how can I stop it?
On radish, flea beetles are a common problem—they chew small holes in leaves and can quickly stunt growth. Use row cover right after sowing, and if needed apply an insecticidal soap early in the day to target beetles. For disease, watch for damp-looking leaf spots or mildew and remove heavily affected leaves to improve airflow.
How often should I water radish (Raphanus sativus) during the main growing phase?
Keep the soil consistently moist but not waterlogged from germination through bulbing (about weeks 2–6). In warm weather this usually means watering about 1–2 times per week, or more often if the top 1 inch dries out; aim for even moisture to prevent tough, cracked roots. Mulch lightly after seedlings emerge to reduce drying swings.
How can I tell when radish (Raphanus sativus) is ready to harvest?
Harvest when roots reach the expected size for your sowing row—often around 45 days, but use root size as the main cue. Gently pull one to check: radishes are best when they’re tender and crisp, not when they get pithy or woody. If roots are still small after ~45 days, look for prolonged cold/heat stress and adjust future sowings for more uniform timing.
Botanical illustration of Shunkyo

Crisp as glass and bright as spring—Shunkyo radish delivers a clean, peppery snap with a sweet, fresh finish. At about 45 days, its slender roots form with a smooth, satiny skin and a vivid, eye-catching color that stays tender rather than woody. Ideal for salad radish use, Shunkyo shines when served fresh for crunchy platters, vibrant garnishes, and quick pickling for a tangy bite.

Sowing Tips

Transplant Conditions

Wait until soil reaches 40°F and nights stay above 28°F before moving outdoors.

Expert Note

Sow directly in cool weather and keep soil evenly moist to prevent pithiness and excessive heat-spice.