The short answer
Basil can grow indoors with strong light, warmth, and consistent watering. A bright window may work in summer; a grow light is often needed during short, dim winter days.
Why this happens
Basil grows poorly in low light and cold drafts. Supermarket herb pots often contain many seedlings crowded together, so separating them carefully can improve growing space.
What to do
- Use a draining container and fresh potting mix.
- Provide a bright window or suitable grow light.
- Water when the surface begins to dry, checking regularly.
- Harvest tips above leaf pairs to encourage branching.
Keep in mind
Indoor plants still attract pests. Avoid products not labeled for edible herbs.