When to Plant Basil in Zone 9
Ocimum basilicum
Last updated: Apr 29, 2026 · Sources: USDA, NOAA, Cooperative ExtensionAction Plan
Plant Basil in Zone 9
- Start indoors: Feb 14
- Transplant: Mar 14 — after last frost (Feb 28)
- First harvest: May 10 (50–75 days after planting)
⚠️ Don't plant before last frost (Feb 28) — cold snaps kill young transplants.
Last frost
Feb 28
First frost
Nov 25
Growing season
270 days
Quick Facts
Sunlight
☀️ Full Sun
Water Needs
💧💧 Moderate
Spacing
12 inches apart
Planting Depth
0.25 inch
Min Soil Temp
60°F
Germination
5–10 days
Days to Maturity
50–75 days
Frost Tolerance
No frost tolerance
Soil pH
6.0–7.0
Difficulty
Easy
What you'll need — Zone 9
🛒 Basil — Seeds & Supplies
- 🌱 Genovese Basil Seeds
- 🌱 Herb Garden Planter Set
- 🌱 Organic Potting Mix
Search for these at your local garden center or nursery.
Growing Tips
- Pinch off flower buds as soon as they appear — flowering triggers leaf bitterness.
- Harvest from the top, never strip the lower leaves first.
- Basil loves heat — don't rush it outdoors. Wait until nights are above 50°F.
- Plant near tomatoes — they're natural companions and the basil may deter aphids.
- Never refrigerate fresh basil — store stems in a glass of water at room temperature.
Common Mistakes
- Planting too early — basil is extremely cold-sensitive. One cool night turns leaves black.
- Watering overhead — basil is prone to fungal spots. Water at the base.
- Not pinching — unpinched basil bolts fast and becomes woody.
- Buying one plant — plant several for a continuous supply through summer.
Companion Planting
Companion planting improves growth, deters pests, and makes better use of garden space.
✓ Good Companions
✗ Avoid Nearby
Sage
Basil Schedule — All Zones
| Zone | Start Indoors | Transplant | Direct Sow | Harvest Start | Harvest End |
|---|---|---|---|---|---|
| Zone 3 | May 1 | May 29 | May 29 | Jul 25 | Sep 12 |
| Zone 4 | Apr 26 | May 24 | May 24 | Jul 20 | Sep 13 |
| Zone 5 | Apr 16 | May 14 | May 14 | Jul 10 | Sep 3 |
| Zone 6 | Apr 1 | Apr 29 | Apr 29 | Jun 25 | Aug 19 |
| Zone 7 | Mar 22 | Apr 19 | Apr 19 | Jun 15 | Aug 9 |
| Zone 8 | Mar 6 | Apr 3 | Apr 3 | May 30 | Jul 24 |
| Zone 9 | Feb 14 | Mar 14 | Mar 14 | May 10 | Jul 4 |
| Zone 10 | Jan 27 | Feb 24 | Feb 24 | Apr 22 | Jun 16 |
| Zone 11 | Jan 1 | Jan 29 | Jan 29 | Mar 27 | May 21 |
| Zone 12 | — | any | any | year_round | year_round |
| Zone 13 | — | any | any | year_round | year_round |
Other Zones for Basil
Zone 3 · Zone 4 · Zone 5 · Zone 6 · Zone 7 · Zone 8 · Zone 10 · Zone 11 · Zone 12 · Zone 13
📚 Data Sources
Frost dates: NOAA Climate Normals 1991–2020, National Centers for Environmental Information.Hardiness zones: USDA Plant Hardiness Zone Map, Agricultural Research Service.
Growing requirements: Cooperative Extension Services — NC State, Penn State, University of Florida IFAS.
Companion planting: Cornell University Cooperative Extension.
Data compiled from public agricultural sources. Always verify with your local extension office for micro-climate adjustments.