Philodendron scottmorianum is a unique and sought-after aroid, prized for its attractive foliage. Cultivating this plant offers a rewarding experience, and understanding its specific needs ensures its beauty and vigor.
Understanding Philodendron Scottmorianum
Philodendron scottmorianum is native to the tropical wet forests of French Guiana. It grows as a hemiepiphyte, starting on the forest floor and climbing trees with aerial roots, or beginning on a host plant. Its thick stems, 4 to 7.2 centimeters in diameter, transition from bright green to silver-grey as they mature.
This species has large, ovate-sagittate leaves with notably long petioles, averaging over 80 centimeters. New leaves unfurl lime green and can exhibit an iridescent quality. It is closely related to P. acutatum, but P. scottmorianum generally grows into a much larger specimen.
Caring for Philodendron Scottmorianum
Light Needs
Philodendron scottmorianum thrives in bright, indirect light. Placing the plant near an east or west-facing window is ideal, as these locations provide gentle morning or late afternoon sun. A north-facing window can also offer consistent, indirect light throughout the day.
Exposure to direct, intense sunlight can lead to leaf burn and yellowing of the foliage. Conversely, inadequate light can result in leggy growth, pale leaves, and stunted development.
Watering
Allow the top inch or two (approximately 25-30%) of the soil to dry out completely before watering. Water thoroughly until it drains from the pot’s bottom. Ensure the pot has drainage holes to prevent root rot from standing water. Overwatering can cause yellowing leaves and mushy stems, while underwatering leads to wilting, drooping, or browning tips.
Soil Requirements
Philodendron scottmorianum requires a loose, well-draining potting mix rich in organic matter. A slightly acidic soil pH, between 5.0 and 6.0, is suitable. A good mix combines equal parts standard potting soil with coco coir. Incorporating perlite, orchid bark, and a small amount of worm castings improves drainage, aeration, and nutrient content.
Temperature and Humidity
These plants flourish in warm, humid conditions. An optimal temperature range for Philodendron scottmorianum is 65 to 85 degrees Fahrenheit (18-30°C). Avoid temperatures below 60 degrees Fahrenheit (15°C), as cold drafts negatively impact the plant. High humidity, ideally 50-55% or higher, benefits robust growth. To increase humidity, use a humidifier, place pebble trays with water near the plant, or group plants together.
Fertilizing
During its active growing season (spring and summer), Philodendron scottmorianum benefits from regular fertilization. Use a balanced liquid fertilizer at half the recommended strength to prevent over-fertilization. Reduce or cease fertilization during fall and winter, as the plant’s growth slows. Nutrient deficiencies can lead to yellowing leaves, while excessive fertilization can cause leaf burn.
Propagating Philodendron Scottmorianum
Propagating Philodendron scottmorianum is achieved through stem cuttings. Select a healthy stem section 3 to 6 inches long with at least one node, where leaves or aerial roots emerge. Cut just above a node on the parent plant to encourage new growth. Remove any lower leaves to prevent submersion in water or soil.
Cuttings can be rooted in water or a moist potting mix. For water propagation, place the cutting in a clean jar of room-temperature water, ensuring the node is submerged. Change the water every few days.
Alternatively, plant the cutting directly into a well-draining, moist potting mix. Position the cutting in bright, indirect sunlight to encourage root development. Roots typically form within a few weeks.
Common Problems and Solutions
Yellowing leaves often indicate a soil moisture issue. Overwatering, leading to soggy soil and root rot, is a frequent cause, especially affecting older leaves. Insufficient watering can also cause yellowing, wilting, or crispy leaf edges. Adjust watering practices to allow the topsoil to dry before rewatering.
Browning leaves or tips are commonly linked to low humidity or direct, harsh sunlight. Increase ambient humidity with humidifiers or pebble trays, and move the plant away from direct sun. Pests like spider mites, aphids, or mealybugs can also cause discolored foliage; inspect the plant and treat with insecticidal soap or neem oil. Slow or leggy growth points to insufficient light, remedied by relocating the plant to a brighter, indirect source.