Zone 8a covers 26 days of last-frost dates. We measured Little Rock, AR at Mar 9 and Baltimore, MD at Apr 4. Give us your town or ZIP and we'll use ten years of daily lows recorded at your own coordinates instead of the middle of that range.
Why these dates work in zone 8a
Zone 8a's last spring frost averages Mar 15 and first fall frost Nov 19 — about 249 frost-free days. Basil is frost-sensitive, so the 2w after frost timing builds in a safety margin against a late cold snap — setting plants out too early risks losing them to frost. Starting seeds indoors 4 weeks ahead gives strong transplants ready the moment the soil warms.
Common questions
How long does basil take to grow in zone 8a?
Basil matures in about 25–35 days from sowing. In zone 8a that means sowing around Mar 29 and first picking around Apr 23.
Will basil survive frost in zone 8a?
No — basil is frost-sensitive. In zone 8a, wait until after the last frost (around Mar 15) to plant, and harvest before the first fall frost (around Nov 19).
For soil, spacing, pests and companion planting, see the full basil growing guide →