Adromischus filicaulis ssp. marlothii is a distinctive succulent, appealing to both new and experienced plant collectors due to its unique form and relatively undemanding nature.
Characteristics of Adromischus filicaulis ssp. marlothii
Adromischus filicaulis ssp. marlothii is a dwarf, sparingly branched succulent featuring fleshy leaves arranged along decumbent or prostrate stems. The leaves are cylindrical with soft points, often described as bulbous or teardrop-shaped. While primarily green, they can develop dark red blotches or purple spots when exposed to sufficient sunlight or environmental stress.
This plant usually grows up to 4-6 inches tall and can spread up to 6 inches in diameter, exhibiting a slow growth rate. Its stems are fleshy, grey-green, and may feature grey flaking bark, producing numerous aerial roots that root upon contact with soil. Native to South Africa, specifically the Western Cape Province, it thrives in dry, rocky habitats, often found in the shade of rocks or other plants. Small, tubular greenish-white or pinkish flowers may appear on long, slender stalks, blooming in late spring or early summer.
Care for Adromischus filicaulis ssp. marlothii
Light Requirements
Adromischus filicaulis ssp. marlothii thrives in bright, indirect light, benefiting from at least 6-8 hours of sunlight daily. While it tolerates some direct sun, particularly morning sun, protection from intense afternoon sun is important to prevent leaf scorching. Insufficient light can lead to etiolation, causing the plant to stretch and appear leggy with pale foliage.
Watering Practices
This succulent requires infrequent watering, following the “drench and dry” method common for most succulents. Allow the soil to dry out completely between waterings to prevent root rot. During the active growing season, spring to fall, watering every 2-3 weeks is sufficient. In winter months, when the plant is dormant, reduce watering significantly to about once a month, ensuring the foliage remains dry.
Ideal Soil and Potting
Well-draining succulent or cactus mix is necessary for Adromischus filicaulis ssp. marlothii to prevent waterlogging. This type of soil often contains 50% to 70% mineral grit such as coarse sand, pumice, or perlite. Pots should always have drainage holes to allow excess water to escape. Terracotta pots are recommended as they promote evaporation and help keep the soil drier. Repotting is infrequent, only when the plant outgrows its container or the soil needs refreshing, as it dislikes root disturbance.
Temperature and Humidity
Adromischus filicaulis ssp. marlothii prefers temperatures between 50-80°F (10-27°C). It can tolerate brief exposure to temperatures as low as 30°F (-1°C), but it is advisable to bring the plant indoors if temperatures drop below freezing. This succulent tolerates low humidity and benefits from good air circulation, aligning with its native dry, rocky habitat.
Feeding Your Plant
Fertilizing is not always necessary but can support faster, more robust growth. If choosing to fertilize, apply a well-balanced, water-soluble succulent fertilizer diluted to half strength. Fertilization should occur sparingly, once every 4-6 weeks during the active growing season in spring and summer. Avoid fertilizing during the winter months when the plant is dormant to prevent potential harm.
Propagating Adromischus filicaulis ssp. marlothii
Propagating Adromischus filicaulis ssp. marlothii is done through leaf or stem cuttings. For leaf propagation, gently remove a healthy, mature leaf from the parent plant, ensuring a clean break. Allow the removed leaf to callus for 3-5 days until the cut end is dry to prevent rot. Place the callused leaf on well-draining, gritty soil and mist lightly to encourage root development and new growth.
Stem cuttings are also viable. Use a sharp, sterile knife or scissors to take a cutting, allowing it to callus for several days before planting. Plant the cutting shallowly in a well-draining succulent potting mix. The best time for propagation is the beginning of spring, during the plant’s active growing season.
Troubleshooting Common Problems
Overwatering is a common problem for Adromischus filicaulis ssp. marlothii, frequently leading to root rot. To prevent this, always allow the soil to dry completely between waterings. If leaves appear shriveled or wrinkled, it indicates underwatering, and a thorough watering should help them plump up.
Insufficient light can cause the plant to become etiolated, resulting in stretched, leggy growth and pale foliage. Moving the plant to a brighter location with ample indirect sunlight can correct this issue. Adromischus filicaulis ssp. marlothii is pest-resistant but can attract mealybugs, scale insects, or spider mites. Infestations can be treated by removing affected leaves and applying insecticidal soap or a diluted rubbing alcohol solution. Leaf drop can occur due to stress or overwatering, signaling a need to review care practices.