How cold can basil tolerate?

Basil is sensitive to cold and can typically tolerate temperatures down to about 50°F (10°C). Exposure to temperatures below this can stunt its growth or lead to the plant’s decline. Frost can be especially damaging, often killing the plant outright. For optimal growth, basil should be kept in warm conditions, ideally between 70°F to 90°F (21°C to 32°C).