Philodendron roseospathum Croat

• Genus: Philodendron
• Botanical Background: Described by renowned aroid specialist Dr. Thomas Croat, who has significantly contributed to the taxonomic understanding of Araceae through his extensive research and field studies.

• Geographical Range: Native to tropical lowland rainforests, where the humid and warm conditions provide an ideal environment for growth
• Environment: Thrives in high-humidity settings with well-draining soils, under a canopy that provides filtered, bright but indirect light; The climate is typically warm and stable year-round.

Leaves

• Large, glossy, heart-shaped leaves
• Leathery texture
• Subtle veining

Inflorescence (Spadix & Spathe)

• Produces a distinct inflorescence with a rose-pink spathe that serves to attract pollinators
• While the spadix is less conspicuous, it plays a key role in the species’ reproductive process

Growth Habit

• Typically a terrestrial climber
• Develops a creeping rhizome that allows it to spread
• Can also adapt to an epiphytic lifestyle when supported by trees

Light Requirements

• Thrives in bright, indirect light
• Too much direct sunlight may scorch its leaves

Watering & Humidity

• Regular watering is needed to maintain moist, well-draining soil
• High humidity levels are ideal

Soil & Potting Mix

• A rich, well-draining potting mix that retains some moisture
• Containers with drainage holes are optimal

Temperature & Fertilizer

• Maintaining an environment with temperatures above 65°F (18°C)
• Balanced liquid fertilizer applied monthly during the growing season

Division

• Most common propagation technique is through division of the rhizome
• Where sections of the root system are separated and replanted

Stem Cuttings (if applicable)

• Stem or node cuttings can also be successful when provided with high humidity

Seeds

• Less common; require warm, humid conditions for optimal germination and may have a lower viability compared to vegetative methods

Typical Issues

• Spider mites and mealybugs
• Root rot can occur if the plant is kept in overly wet conditions

Treatment Recommendations

• For pests, insecticidal soap or neem oil is effective
• Root rot can be prevented by ensuring the soil is well-draining and by allowing the top few centimeters of soil to dry out before re-watering

• The species’ rose-colored spathe is a rare and eye-catching feature among philodendrons
• Highly prized for its ornamental foliage and dramatic inflorescence

• A standout specimen in both indoor and greenhouse collections

Wild Population Status

• While there are no immediate conservation concerns specific to this species, ongoing tropical habitat loss is a general threat to many aroids

Market Availability

• Moderately available in specialty nurseries and among dedicated aroid collectors