The Pothos plant (Epipremnum aureum) is a popular houseplant known for its resilience and trailing vines. While forgiving year-round, its care requirements shift significantly in winter. The seasonal change slows the plant’s internal biology, requiring an adjustment to its watering routine because this reduced metabolic activity impacts the amount of water the Pothos needs.
Recommended Winter Watering Frequency
The shift in winter watering is driven by the Pothos entering a state of semi-dormancy. This period involves a significant slowdown in growth and nutrient uptake, dramatically reducing the plant’s water needs. Pothos typically requires water only once every two to four weeks during the coldest months, a substantial reduction from summer frequency.
This reduced schedule reflects the plant’s lower rate of photosynthesis and transpiration, meaning less moisture is drawn up from the soil. This frequency is not a rigid rule, as environmental factors within a home alter the actual rate of soil drying. The principle is to allow the soil to dry out much more thoroughly between waterings than during the active growing season.
Environmental Influences on Moisture Needs
The internal conditions of your home during winter are the primary variables causing the watering schedule to fluctuate. Reduced daylight hours and lower light intensity decrease photosynthesis, causing the plant to consume less water. Cooler ambient temperatures, especially near windows, contribute to a slower water cycle by reducing the rate of transpiration.
Forced-air central heating systems introduce a paradox by creating an extremely dry atmosphere. This low humidity causes the top layer of the potting mix to dry out rapidly due to increased evaporation. The soil might feel dry on the surface while deeper layers remain saturated, often leading to overwatering issues. The perceived dryness of the air does not translate to a thirsty plant, especially when the Pothos is metabolically sluggish.
Practical Methods for Checking Soil Dryness
Determining when to water requires moving beyond a fixed calendar schedule and focusing on the actual soil moisture level. The most reliable method is the finger test, which involves inserting a clean finger one to two inches deep into the potting mix. If the soil feels completely dry at this depth, it is time to water; if it feels cool or damp, wait several more days.
The plant also provides visual cues when it is genuinely thirsty. A Pothos will exhibit slight curling or drooping of its leaves when water reserves are low, signaling a need for hydration. Another useful technique is the weight check: lift the pot and compare its current weight to its weight immediately after a thorough watering. A significantly lighter pot indicates the soil is depleted of moisture. The greatest risk during the winter is overwatering, which leads to root rot in the soggy, slow-drying soil.