The Swiss Cheese Monstera, known scientifically as Monstera adansonii, is a popular houseplant prized for its perforated foliage. Water management is the single most significant factor in maintaining the health and characteristic appearance of this tropical vine. There is no set schedule for watering, such as “every five days” or “every Sunday,” because the plant’s needs fluctuate constantly. Determining when to water depends entirely on the current moisture level of the potting mix and the environmental conditions surrounding the plant.
Determining the Optimal Watering Time
The most accurate method to determine if your Swiss Cheese Monstera needs water is by physically checking the soil moisture, often called the “finger test.” You should only water the plant when the top one to two inches of the potting mix feels completely dry to the touch.
If you feel any significant moisture or dampness when checking the soil, postpone watering and check again in a day or two. When the top layer is dry, thoroughly soak the plant using the “soak and dry” method. This technique involves pouring water evenly over the soil surface until it begins to flow freely from the drainage holes at the bottom of the pot.
Allowing the water to drain completely is important to prevent the roots from sitting in standing water and developing root-related diseases. Discard any excess water that collects in the saucer or cachepot after about 15 minutes to avoid a perpetually soggy substrate.
External Factors Influencing Water Needs
The frequency of watering will naturally change due to various external factors in your home environment. During the active growing season (spring and summer), the plant uses water at a much faster rate. You must significantly reduce watering frequency in the fall and winter months as the plant’s growth slows down.
Light exposure strongly influences water usage because brighter, indirect light encourages more rapid photosynthesis. A Monstera adansonii placed in a location with strong light will dry out more quickly than one situated in a lower-light spot. Warmer room temperatures, ideally between 65°F and 85°F, will also accelerate the evaporation of moisture from the potting mix.
Low ambient humidity increases the rate of water loss from the leaves, causing the soil to dry faster. As a tropical plant, the Swiss Cheese Monstera thrives in humidity levels ideally maintained above 50 percent.
Recognizing and Addressing Watering Problems
Visual cues from the plant are the clearest indicators that your watering routine needs adjustment. Overwatering is often signaled by the yellowing of the lower, older leaves and the presence of dark brown or black spots on the foliage. The most serious consequence is root rot, indicated by soft, mushy stems and soil that remains saturated for a long period. If overwatering is suspected, stop watering immediately and allow the soil to dry out completely.
Underwatering presents visual symptoms that reflect dehydration. The leaves will often appear limp or droopy, but they will still feel relatively firm to the touch. Another sign of a thirsty plant is the appearance of brown, crispy edges or tips on the leaves. If the plant shows signs of dehydration, thoroughly soak the entire pot until water drains, ensuring the potting mix is fully rehydrated.