Growing Basil Indoors: Light, Pot Size, Watering, and Harvesting

Basil is challenging indoors but possible with the right setup. Your afternoon sun is insufficient—basil needs intense morning light.

Essential Requirements

• Light: 16h of 300+ µmol/m²/s. South window + 16h LED grow light (full-spectrum, 6" above).
• Temperature: 70–85°F day / 65°F+ night. Heat mat helps.
• Pot: 6"+ deep, wide. Transplant from 4" now.
• Water: Every 3 days, when top 1" dry. Never daily. No soggy soil.
• Feed: Liquid fish/seaweed every 3 weeks (half-strength).
• Airflow: Small fan on low.
• Prune: Cut 1/3 from tips every 3 weeks. Pinch flowers.

Harvesting

Pinch individual leaves or cut stems above a leaf pair. Never strip a stem bare. Regular pruning = continuous harvest.

AeroGarden?

Works for basil if light height adjustable and nutrients managed. Expensive vs. DIY setup. A $50 LED panel + $20 heat mat + pots outperforms for less.

Signs of Unhappiness

• Daily watering need → pot too small / soil wrong / light too low.
• Woody stems → insufficient pruning / light.
• Yellow leaves → overwater / underfeed / cold.

Move to 6" pot, add grow light, adjust water/feed, prune aggressively. New growth should be lush.