Monstera dubia, commonly known as the shingle plant, is a fascinating and somewhat unusual vining aroid prized for the dramatic transformation of its foliage as it matures. In its juvenile stage, this Monstera features small, heart-shaped leaves with silvery variegation that lie flat and "shingle" (attach) closely against a climbing surface. As the plant climbs and matures, the leaves can become much larger and may develop characteristic fenestrations or splits. Its unique growth habit makes it a captivating specimen for indoor cultivation in the UK. It is a member of the Araceae family.
The genus name Monstera likely refers to the impressive size that some species in this genus can achieve in their natural environment. Dubia means "doubtful" or "dubious," possibly referencing early confusion about its classification or its changing leaf forms.
Light: Monstera dubia thrives in bright, indirect light. Strong, direct sunlight can scorch its delicate leaves, while insufficient light may result in slower growth, less pronounced variegation, and a reluctance to develop mature leaf forms. A position near a window with filtered light in a typical UK home is suitable.
Water: The potting mix should be kept consistently moist but not saturated. Allow the upper inch or two of the soil to dry between waterings. Ensure good drainage to prevent root issues, which can be a common problem, especially in the UK's climate. Reduce watering in autumn and winter when the plant's growth slows.
Soil: A well-draining, airy potting mix is essential. A mix specifically designed for aroids, incorporating materials such as coco coir, perlite, and orchid bark, is often recommended to provide the necessary aeration and drainage.
Fertilising: Use a diluted, balanced liquid fertiliser every three to four weeks during its active growing period in spring and summer. Reduce or stop fertilising during the autumn and winter months.
Temperature: This plant prefers warm temperatures, ideally between 18°C and 29°C (65°F and 85°F). It should be protected from cold drafts and temperatures below 10°C (50°F), which can occur indoors, particularly during colder UK months.
Humidity: High humidity levels are highly beneficial for Monstera dubia. Consider using a humidifier, pebble tray, or placing it in a naturally humid room to maintain optimal conditions, particularly during drier indoor periods in the UK. This also encourages the plant to "shingle" and mature.
Growth Habit: In its juvenile form, it is a climbing vine with leaves that lie flat against a surface (shingling). As it climbs and matures, it develops larger, fenestrated leaves. Providing a moss pole or wooden plank is crucial for encouraging this mature growth.
Toxicity: Like other Monsteras, Monstera dubia is toxic if ingested by humans or pets, as it contains calcium oxalate crystals. Keep it out of reach of children and animals. Its sap can also be irritating to the skin.