Tennessee planting calendar

When to plant basil in Tennessee — sow, transplant & harvest dates

Tennessee is mostly USDA zone 7a (range 6a-8a). Dates below are derived from basil's frost tolerance and Tennessee's frost window — not generic national averages.

Basil planting timetable for Tennessee

Stage	When in Tennessee	Anchor
Start seeds indoors	early March (March 4)	6 weeks before the last frost (mid-April)
Transplant outside	late April (April 22)	7 days after the last frost (mid-April)
First harvest (estimate)	late June (June 21)	~60 days from transplant

Dates are state-wide averages for the dominant zone. Local microclimates — elevation, urban heat, coastal moderation — can shift the window by 1-2 weeks. Use the frost-date calculator for a date tuned to your town.

Why Tennessee's climate shifts the basil dates

Tennessee's last spring frost averages mid-April and first fall frost late October, which sets the whole planting clock. Tennessee has a long, humid, warm season with mild winters. The eastern mountains run a zone cooler than the western lowlands. Wait for warm soil — basil stall in cold ground even after the air warms, so don't rush them out.

Basil is one of the most cold-sensitive common herbs — it sulks below 10 °C and dies in light frost. Wait a full week after the last spring frost before moving transplants outside, or direct-sow two weeks after frost when soil hits 18 °C.

Frost-risk note

Don't plant before mid-April — even a light frost will kill seedlings overnight. In the eastern Appalachian highlands (zone 6a) the safe date runs a week or two later.

Regional variation within Tennessee

the eastern Appalachian highlands (zone 6a) runs roughly 1-2 weeks behind the state average; the western Mississippi lowlands near Memphis (zone 8a) can plant 1-2 weeks earlier.

Nashville — USDA zone 7b
Memphis — USDA zone 8a
Knoxville — USDA zone 7b
Chattanooga — USDA zone 7b

What else to plant in Tennessee around then

Pair the post-frost slot with other warm-season crops — peppers, beans, squash, and cucumbers.

Quick-grow guide

Sun: Full sun — 6+ hours direct.
Soil temperature for germination: 20-25 °C (68-77 °F).
Spacing: 8-12 inches (20-30 cm) between plants.
Days to harvest: ~60 days from planting out.

Frequently asked questions

When is the best time to plant basil in Tennessee?

In Tennessee (mostly USDA zone 7a), sow basil indoors around early March, transplant outdoors late April (after the last frost, mid-April), and harvest from late June. Basil are frost-tender — a single light frost kills seedlings, so they only go outside once frost danger has fully passed and the soil is warm.

What USDA zone is Tennessee?

Most of Tennessee sits in USDA hardiness zone 7a, with the state spanning roughly 6a-8a from the eastern Appalachian highlands (zone 6a) to the western Mississippi lowlands near Memphis (zone 8a). The last spring frost averages mid-April and the first fall frost late October.

Can you grow basil in Tennessee?

Yes. Tennessee's dominant zone 7a supports basil — the key is timing. Basil are frost-tender — a single light frost kills seedlings, so they only go outside once frost danger has fully passed and the soil is warm.

Does the planting date change across Tennessee?

the eastern Appalachian highlands (zone 6a) runs roughly 1-2 weeks behind the state average; the western Mississippi lowlands near Memphis (zone 8a) can plant 1-2 weeks earlier.

What else can I plant in Tennessee around the same time?

Pair the post-frost slot with other warm-season crops — peppers, beans, squash, and cucumbers.

Source and methodology

State zone spans from the USDA Plant Hardiness Zone Map (2023); frost-date averages from NOAA Climate Data Online. Hot-state two-season timing cross-checked against the UF/IFAS Florida Gardening Calendar and the University of Arizona Cooperative Extension planting calendar. Curated by the Growli editorial team.