Watermelon Peperomia plants (Peperomia argyreia) are easy to care for as long as you know the type of environment they like. I did wonder if it would be happy with the temperature and humidity in my home. After doing some research, I learned that, yes, it would be! Join me as I dive into watermelon peperomia’s preferred temperature and humidity ranges.
Watermelon Peperomia Native Habitat
These tropical plants are native to warm, humid forests in South America. In these areas, they grow on rainforest floors underneath taller plants.
Tropical rainforests provide moderate to high humidity and warm temperatures. And since watermelon peperomia grow on the forest floor, they grow in soil high in organic matter and receive dappled light.
Watermelon peperomia plants grow best in warm temperatures. I’ve found that these plants are happiest at temperatures between 60-85°F, but the plants can tolerate brief periods a bit outside this range. Fortunately, most households are within this temperature range.
Along with looking at the overall air temperature, you should also consider sudden changes in temperature. These changes can stress your plant, leading to discolored leaves, slowed growth, and other issues.
Moving your plant from a warm home to a colder outdoor environment is one way that temperature change occurs. However, drafts are a more common threat to houseplants like watermelon peperomia. Fireplaces, radiators, air conditioning vents, and poorly insulated windows can all cause hot or cold drafts and sudden changes in temperature, so keep your plants away from these areas.
Although watermelon peperomia plants are native to tropical rainforests, they don’t necessarily need high humidity. They’ll protest if you keep them in a super dry home, but average household humidity works just fine.
I’ve had my plant growing in my home with moderate humidity, and it’s remained healthy. The plant remained unaffected even after I turned on the heat and the humidity dropped. This suggests these plants aren’t really that sensitive to humidity, even though they would prefer higher air moisture.
If the air in your home is super dry, you can increase the humidity in numerous ways. A humidifier is the best way, since it constantly releases water vapor into the air. Some humidifiers also have features that allow them to shut off once they detect a certain humidity level.
Other less effective, but less expensive, methods include using a pebble tray or misting the air around your plant. To use a pebble tray, fill a small dish with pebbles then water and place it under your planter. Make sure the pot’s drainage holes aren’t sitting in the water.
Signs Your Watermelon Peperomia Received the Wrong Temperature or Humidity
As long as you keep the temperature and humidity in the ranges I described above, your plant will remain happy. If you notice issues like yellowing leaves or drooping watermelon peperomia plants, check other factors like water, light, and soil.
With that said, the following issues may indicate improper temperature and/or humidity.
If you notice your watermelon peperomia’s leaves fading from bright green to yellow, something is awry. Many different factors can cause yellowing leaves, including overwatering your watermelon peperomia and a lack of fertilizer for your watermelon peperomia plants. However, temperature and humidity can also cause this change in color.
Exposure to temperatures below 50°F can stress the plant and cause it to develop yellow leaves. Remember to keep your plant away from any cold drafty areas like near air conditioning vents and exterior doors.
Extremely low humidity can also cause yellow leaves.
If you notice your plant is dropping its leaves, it may be due to temperature stress. Avoid sudden changes in temperature and keep the air warm.
Remember to keep your watermelon peperomia in a warm environment with moderate to high humidity. As long as you provide the proper care, it will flourish in this environment.
Briana holds a B.S. in Plant Sciences from Penn State University. She manages a small market garden where she grows vegetables and herbs. She also enjoys growing flowers and houseplants at home.