Coleus plants can tolerate temperatures as low as 30°F for very short durations, but they thrive in warmer conditions

. Temperatures between 65°–75°F are ideal for maintaining vibrant foliage and preventing stress

. Here's what you should know about coleus and cold temperatures:

• Minimum Tolerable Temperature Coleus can handle a light frost, but prolonged exposure to freezing temperatures will likely kill them

. They can briefly tolerate temperatures down to 33°F, but this is too cold for them

• Ideal Temperature Range Coleus plants flourish when temperatures are consistently between 65° and 75°F during the day and above 60°F at night

• Signs of Cold Stress If a coleus is too cold, its leaves may darken or develop a water-stained appearance

. Frost can quickly damage or kill the plant

• Overwintering In areas where temperatures drop below freezing, coleus can be brought indoors to survive the winter

. They need bright, indirect sunlight and protection from drafts

. You can also take stem cuttings to propagate new plants

• Hardiness Zones Coleus thrives in zones 10a-11b, where winter temperatures are milder

. In zone 10a, coleus can tolerate temperatures down to 30°F, while in zone 11b, they are comfortable down to 50°F

• Frost Sensitivity Coleus are not frost-tolerant and are typically grown as annuals in regions with frost

. Frost can melt their foliage, causing the plant to die

• Other Considerations Coleus plants will droop and look unhealthy in temperatures below 50°F, and their growth will stop

. Consistent temperature monitoring can help prevent temperature-induced stress