When should I plant radishes in ZIP 38103?

In ZIP 38103, the main radishes target is around Feb 25, based on the representative Memphis frost station and USDA zone 8a.

When should I start radishes seeds indoors in 38103?

Radishes is usually direct-sown for ZIP 38103. Use the Feb 25 planting window instead of starting it indoors.

Is this a guaranteed planting date?

No. GrowZone uses frost-date estimates, hardiness zones, and crop timing rules for planning. Local microclimates and current weather can shift the right date.

ZIP 38103 planting calendar

When to plant radishes in Memphis, TN - Zone 8a

Q: When is the first frost in Memphis?

Memphis (ZIP 38103) has an average first fall frost around Nov 5, leaving about 225 frost-free days.

In ZIP 38103, plant radishes around Feb 25; this uses the Memphis frost station, USDA zone 8a, and radishes timing rules.

Your Memphis calendar has a 225-day estimated frost-free season. This estimate uses the representative Memphis frost station, USDA zone 8a, and radishes timing rules.

Source: memphis-intl frost station, USDA zone 8a, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.

USDA zone 8a Memphis frost station University of Tennessee Extension Updated 2026-06-28

Read the method

Answer first

When to start radishes seeds indoors in Memphis

In ZIP 38103, radishes is usually direct-sown around Feb 25 instead of started indoors.

Radishes is normally direct-sown in Memphis. Use around Feb 25 as the outdoor planting window for ZIP 38103.

Seed starting schedule

Radishes dates for Memphis, TN

Step	Date	How to use it
Direct Sow	February 25, 2026	Sow seed outside when the crop and soil can handle the window.

Last frost

When is the last frost in Memphis?

Memphis (ZIP 38103) has an average last spring frost around Mar 25.

First frost

When is the first frost in Memphis?

The average first fall frost is around Nov 5, giving about 225 frost-free days.

Season map

Radishes windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Direct sow

Feb 25

Harvest

Mar 25

Frost watch

Oct 8

Reminder workflow

Every date has a next action

Direct sow radishesFeb 25

Last frost windowMar 25

First radishes harvest windowMar 25

Last radishes sowing targetOct 8

Signal	Value	Why it matters
Last frost estimate	March 25, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	November 5, 2026	Fall planting counts backward from this date.
Season length	225 days	Longer seasons can support succession crops.
Spacing	1-2 in	Airflow and root space affect yield.
Soil temperature	40 F+	Seeds and transplants stall in cold soil.

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Local data

Why this date changes by ZIP

Memphis frost history and USDA zone 8a shift the safe planting window. GrowZone uses a local representative station instead of one national rule.

University of Tennessee Extension is the kind of local source to verify against when a crop is expensive, weather is unusual, or your yard has a cold pocket.

Crop note

Radishes timing notes

Fast crop; harvest promptly before roots get woody. Radishes prefers full sun, 1-2 in spacing, and soil near 40 F+.

For fall, count backward from Nov 5. A conservative last sowing target is around Oct 8.