SproutSmart
SproutSmart™ Intelligent Garden Sowing

Long White

Radish
Zone 13b 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 13b, 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 13b typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Long White.

Garden Alerts

In frost-free Zone 13b, grow this cool-season crop during the cooler dry season (October–February).

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Frequently Asked Questions

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.
How can I tell when long radish (Raphanus sativus) is ready to harvest?
Harvest when the roots reach the expected size and feel firm—usually around 55 days from sowing, but check early by gently pulling one plant. The skin should look smooth and the top of the root should be well-formed; if it’s still narrow or soft, give it a few more days. Don’t wait too long, because prolonged time in the ground can lead to tough texture and a stronger, more pungent bite.
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 13b typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Long White.

Garden Alerts

In frost-free Zone 13b, 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.