SproutSmart
SproutSmart™ Intelligent Garden Sowing

Long White

Radish
Zone 12a Save Garden

Planting Schedule

Add Long White to your garden to build a schedule and get reminders.
Botanical illustration of Long White
55d to harvest

Crisp and luminous, Long White winter radish delivers a clean, cool snap with a gently peppery edge that mellows beautifully as the roots mature. The long, slender white roots hold a smooth, firm texture and stay attractive in the garden, making them as satisfying to grow as they are to savor. Ideal for roasting until tender, grating into bright winter slaws, and pickling for a crisp, tangy bite.

Crop Dates

Growing note: In frost-free Zone 12a, grow this cool-season crop during the cooler dry season (October–February).
MilestoneDate
Start Indoors—
ClimateFrost-Free Climate
Transplant / Sow OutdoorsOct 1st
Harvest BeginsNov 25th
Harvest EndsFeb 28th

Crop Details

TraitValue
Days to Maturity55
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

Today's Conditions

Outdoor planting for Long White in Zone 12a typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Long White.

Garden Alerts

In frost-free Zone 12a, grow this cool-season crop during the cooler dry season (October–February).

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Frequently Asked Questions

What pest or disease problem commonly affects Raphanus sativus (radish) and how do I control it?
A frequent issue is flea beetle damage, which causes small shot-hole holes in radish leaves and can stunt growth. Use floating row cover from sowing until the plants are established, then remove to allow pollinator access if needed; for heavy pressure, apply an approved insecticidal soap and reapply per label after rain. If you see leaf yellowing and downy/moldy growth, remove badly affected leaves and avoid wetting foliage to reduce spread.
How often should I water Raphanus sativus during the main growing phase?
During bulbing (roughly weeks 3–6), keep the soil consistently evenly moist—about 1 inch of water per week total, adjusted for rainfall and container size. Water lightly but more frequently during hot spells so the soil doesn’t dry out; irregular moisture is a common cause of pithy or woody radishes. Check by feel: the top 1 inch should stay damp, not soggy.
Botanical illustration of Long White

Crisp and luminous, Long White winter radish delivers a clean, cool snap with a gently peppery edge that mellows beautifully as the roots mature. The long, slender white roots hold a smooth, firm texture and stay attractive in the garden, making them as satisfying to grow as they are to savor. Ideal for roasting until tender, grating into bright winter slaws, and pickling for a crisp, tangy bite.

Today's Conditions

Outdoor planting for Long White in Zone 12a typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Long White.

Garden Alerts

In frost-free Zone 12a, grow this cool-season crop during the cooler dry season (October–February).

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 40°F for reliable germination and early growth.

Expert Note

For winter storage radishes like ‘Long White,’ sow in late summer so they size up in cool weather and avoid bolting.