How to Grow Basil
Ocimum basilicum
The quintessential summer herb — warmth-loving, fragrant, and quick from seed.
About basil
Basil is the essential summer herb, the soul of pesto and the perfect companion to tomatoes both in the garden and on the plate. It’s a tender annual that craves warmth and sun and sulks in any cold. Pinch it often to keep it bushy and to delay flowering, which is the secret to a long harvest.
When to plant and harvest basil
Timing is relative to your frost dates. Find your USDA zone for exact dates, or browse the month-by-month calendars.
Start seeds indoors
4–6 weeks before last frost
Transplant outdoors
1–2 weeks after last frost, once warm
Direct sow
After last frost in warm soil
Harvest
Summer until frost
How to grow basil step by step
- 1
Start indoors under warmth and bright light, or direct-sow once the soil is warm.
- 2
Never rush basil into cold soil — it stalls and yellows below 50°F.
- 3
Pinch the growing tips regularly to force bushy growth.
- 4
Remove flower buds as they form to keep leaves tender and production going.
- 5
Harvest in the morning for the strongest aroma.
Common problems growing basil
⚠ Black spots / wilting after cold
Basil is frost-tender and damaged by cold; wait for warm weather.
⚠ Bolting (flowering)
Pinch flower buds promptly — flowering turns leaves bitter.
⚠ Downy mildew
Improve airflow, water at the base, and grow resistant varieties.
✗ Keep away from
🧺 Harvesting basil
Harvest by pinching just above a leaf pair, which prompts two new branches to form. Regular cutting keeps the plant productive and stops it from flowering.
Basil: frequently asked questions
How do I keep basil from flowering?＋
Pinch off flower buds as soon as you see them and harvest the tips regularly. Flowering makes leaves bitter and slows growth.
Can basil grow indoors?＋
Yes, on a bright sunny windowsill or under a grow light — it needs plenty of light and warmth.
Grow basil in your zone
See exactly when to plant and what else to grow alongside basil, tailored to your USDA hardiness zone.
