Can coffee plants survive cold winters?
Written by
Tina Carter
Reviewed by
Prof. Martin Thorne, Ph.D.Like all plants, coffee cannot survive freezing temperatures, but those of you who grow in cold climates can be successful with preparation. I bring my Arabica inside for the winter to sit by a south-facing window and add a humidifier to prevent dry air. Container gardening is critical here, as they can come inside when frost occurs.
Temperature Control
- Minimum 60°F (15°C) for healthy growth
- Use digital thermometers to monitor day/night swings
- Heat mats boost root zone temps by 5-8°F
Light & Humidity
- Supplement with full-spectrum LED lights 10 hours daily
- Pebble trays maintain 50-60% humidity near radiators
- Group plants to create microclimates
Slowly transition plants indoors, to avoid shock. I begin moving pots two weeks before the first frost, and I increase their time inside every day - this is a subjective time frame and adjustment. I also usually check the plants monthly for pests - scale insects traveled with my plant one time, and I visited for treatment with neem oil. Also, be sure to rotate the containers every week or so, to ensure even light distribution from the windows.
Signs of Stress
- Leaf curling indicates temperature drops below 50°F
- Blackened stems signal frost damage
- Sudden leaf drop from cold drafts
Emergency Measures
- Move to warmest room immediately
- Trim dead tissue with sterilized shears
- Water sparingly until new growth appears
Vigilance will aid northern growers achieve results. My station in Minnesota combines insulated grow tents and seedling heat mats to sustain a temperature of 68°F (20°C) during Minnesota's winter months of -20°F (-29°C). In the spring, plants are acclimated outdoors gradually; two hours of sun each day builds frost hardiness resistance and does not shock tender leaves either.
Read the full article: How to Grow Coffee at Home: Expert Tips for Success
