Philodendron pastazanum
Philodendron pastazanum
Philodendron pastazanum is a striking tropical plant known for its unique, heart-shaped leaves and vibrant green color. Native to the rainforests of South America, it is a popular choice among houseplant enthusiasts for its ease of care and ability to thrive in indoor environments.
Everything it needs
9 essentials at a glance
Watering
Philodendron pastazanum prefers to be kept slightly moist but not soggy.
Water when the top 1-2 inches of soil feel dry, typically every 1-2 weeks. In the growing season (spring and summer), increase frequency as needed, while reducing in the fall and winter. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause leaf curling and browning tips.
Light
This plant thrives in bright, indirect light but can tolerate low light conditions.
Ideally, place it near a window with filtered light for about 6-8 hours daily. Avoid direct sunlight, which can scorch the leaves, and ensure it has some shade during the hottest part of the day.
Soil
Philodendron pastazanum prefers a well-draining potting mix with a pH range of 5.5 to 7.0.
A mix of peat, perlite, and orchid bark is ideal for good aeration and drainage. Ensure the pot has drainage holes to prevent water accumulation.
Humidity
This plant enjoys high humidity levels of 60% or more.
To increase humidity, consider using a humidifier, placing a pebble tray filled with water beneath the pot, or grouping it with other plants. Signs of humidity stress include browning leaf edges and wilting.
Temperature
The ideal temperature range for Philodendron pastazanum is between 65-80°F (18-27°C).
It is not frost-tolerant and prefers to be kept above 50°F (10°C). This plant thrives best in USDA hardiness zones 10-12.
Fertilizing
Use a balanced liquid fertilizer with an NPK ratio of 20-20-20 or a slow-release fertilizer every 4-6 weeks during the growing season.
Reduce or stop fertilizing in the fall and winter. Signs of nutrient deficiency include yellowing leaves, stunted growth, and poor leaf development.
Pruning
Prune Philodendron pastazanum in spring to maintain its shape and remove any dead or yellowing leaves.
Use clean, sharp scissors or pruning shears. You can also pinch back the tips of stems to encourage bushier growth. Deadheading is not necessary for this plant.
Repotting
Repot when the plant becomes root-bound, typically every 1-2 years.
Choose a pot that is 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes and slowed growth. To repot, gently remove the plant from its current pot, loosen the roots, and place it in fresh potting mix.
Propagation
Propagation can be done through stem cuttings or division.
For stem cuttings, take a cutting with at least one node and place it in water or moist soil. Change the water every few days if using water propagation. For division, carefully separate the root ball into sections during repotting. The best time to propagate is in spring or early summer.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or insufficient light.
How to fix it
Adjust watering schedule and ensure the plant receives adequate light.
Brown leaf tips
Why it happens
Low humidity or under-watering.
How to fix it
Increase humidity levels and adjust watering frequency.
Leggy growth
Why it happens
Insufficient light.
How to fix it
Move the plant to a brighter location to encourage bushier growth.
Root rot
Why it happens
Excessive moisture in the soil.
How to fix it
Allow the soil to dry out, and if necessary, repot into fresh, dry soil.
Pests (e.g., spider mites, aphids)
Why it happens
Dry conditions or weak plant health.
How to fix it
Regularly inspect the plant, and treat infestations with insecticidal soap or neem oil.
Care through the year
Spring
In spring, increase watering frequency as the plant enters its growing season. Fertilize every 4-6 weeks to promote healthy growth.
Summer
During summer, ensure the plant receives bright, indirect light and maintain humidity levels. Water regularly, allowing the top soil to dry slightly between waterings.
Fall
In fall, gradually reduce watering as the plant's growth slows. Continue to fertilize until late fall, then stop for the winter months.
Winter
In winter, keep the plant in a warm location away from drafts. Water less frequently, allowing the soil to dry out more between waterings.
Toxicity & Safety
Philodendron pastazanum is toxic to pets (cats and dogs) and children. The plant contains calcium oxalate crystals, which can cause irritation, swelling, and pain if ingested. Symptoms include mouth and throat irritation, vomiting, and difficulty swallowing.
Good to know
Why are my Philodendron pastazanum leaves turning yellow?
Yellow leaves can indicate over-watering or insufficient light. Check the soil moisture and ensure the plant is receiving adequate indirect light.
How often should I water my Philodendron pastazanum?
Water when the top 1-2 inches of soil feel dry, typically every 1-2 weeks. Adjust frequency based on the season and humidity levels.
What type of soil is best for Philodendron pastazanum?
A well-draining potting mix with a pH range of 5.5 to 7.0 is ideal. A mix of peat, perlite, and orchid bark works well.
How can I increase humidity for my Philodendron pastazanum?
You can increase humidity by using a humidifier, placing a pebble tray with water beneath the pot, or grouping it with other plants.
When should I repot my Philodendron pastazanum?
Repot every 1-2 years or when you notice roots growing out of the drainage holes. Spring is the best time to repot.
Is Philodendron pastazanum toxic to pets?
Yes, Philodendron pastazanum is toxic to pets and children. It contains calcium oxalate crystals that can cause irritation if ingested.
How do I propagate Philodendron pastazanum?
You can propagate through stem cuttings or division. For stem cuttings, take a cutting with a node and place it in water or moist soil.
Grows well with
Track this plant in your garden.
Set care reminders, log growth, and join a community of plant lovers.