Leaf Curling and Browning

Underwatering

To address underwatering in Monstera adansonii narrow leaf form, ensure a consistent watering schedule that keeps the soil slightly moist but not waterlogged. Allow the top inch of soil to dry out before watering again. If the plant is severely dehydrated, soak the pot in a water bath for about 45 minutes to rehydrate evenly. Adjust your watering frequency according to seasonal changes, as indoor heating during winter or air conditioning in summer can affect soil moisture levels.

Spider Mite Infestation

Spider mites are tiny pests that thrive in warm, dry conditions. They feed on the sap of the Monstera adansonii narrow leaf form, causing yellowing, speckled leaves, and webbing on the plant.

To combat spider mites, first isolate the affected plant to prevent spread. Increase humidity around your Monstera as spider mites prefer dry conditions. Wash the plant gently with water to remove mites and their webs. For severe infestations, use a neem oil solution or insecticidal soap, applying it thoroughly to the leaves, especially the undersides, every 7-10 days until the mites are eradicated. Regularly check the plant and its neighbors to prevent re-infestation.

Leaf Yellowing

Nutrient Deficiency

Monstera adansonii narrow leaf form can experience yellowing leaves due to a lack of essential nutrients, particularly nitrogen. To address this, ensure the plant is fertilized regularly with a balanced, water-soluble fertilizer. Apply the fertilizer every 4-6 weeks during the growing season (spring and summer), and reduce to every 8 weeks in the fall and winter. Always follow the recommended dosage on the fertilizer package to avoid over-fertilization, which can also lead to leaf yellowing.