Adromischus herrei is a unique and visually captivating succulent. Known for its compact growth and intriguing leaf textures, this fascinating plant offers a rewarding experience for enthusiasts. Its unusual forms and relatively straightforward care make it a desirable addition to diverse plant collections.
Identifying Adromischus Herrei
Adromischus herrei is a small, slow-growing succulent shrub, typically reaching 10 to 15 centimeters tall. Its most notable feature is its thick, fleshy leaves, often described as warty, rough, or resembling dried raisins. These leaves display colors from green to reddish-brown or purple, sometimes developing a grey, waxy coating as they age. Each elongated leaf measures 1.5 to 3.5 centimeters long and can be nearly spherical to lanceolate, featuring irregular grooves and texture. The plant forms a compact cluster of these leaves, often appearing almost stemless. Native to Southern Africa, specifically the Little Namaqualand region of the Northern Cape in South Africa and Namibia, it naturally thrives nestled in the cracks of granite hills.
Adromischus Herrei Care
Light
Adromischus herrei flourishes in bright, indirect light, mimicking its natural habitat protected under shrubs or rocks. While it tolerates some direct sun, particularly morning or evening exposure, avoid intense midday sun to prevent leaf sunburn. Insufficient light can cause the leaves to become paler and elongated.
Soil
Adromischus herrei requires a well-draining, gritty potting medium, ideally mineral-heavy with very little organic matter. Incorporating amendments such as perlite, pumice, or coarse sand enhances drainage. Proper drainage is paramount; the plant will rot if its roots are constantly wet.
Watering
Water using the “soak and dry” method: water thoroughly until it drains from the pot, then allow the soil to dry completely before the next cycle. Since Adromischus herrei stores water in its fleshy leaves, it tolerates underwatering better than overwatering. Frequency varies by climate and pot size, generally every 7 to 10 days during active growth in autumn and spring. During summer dormancy and cooler winter months, significantly reduce watering, possibly to once a month or less.
Temperature and Humidity
Adromischus herrei prefers warm temperatures, ideally 15-25°C (59-77°F), though it tolerates 5-30°C (41-86°F). It is not frost-hardy but can withstand temperatures as low as 0°C (32°F) for very short periods. Protect the plant from heavy winter rains and freezing conditions. It thrives in low humidity environments with good air circulation.
Fertilizing
Fertilizing requirements for this slow-growing succulent are minimal. If desired, apply a succulent-specific fertilizer sparingly, at half strength, during its active growing seasons in spring and summer. Fertilization is not necessary during its winter dormant period.
Potting and Repotting
Adromischus herrei does not require frequent repotting and tolerates being somewhat potbound. Repot every two to three years, ideally in spring. Choose shallow, wide pots only slightly larger than the current one, as oversized containers retain too much moisture. After repotting, wait about a week before watering to allow any disturbed roots to heal.
Propagating Adromischus Herrei
Adromischus herrei propagates effectively using leaf or stem cuttings. Seed propagation is rarely employed.
Leaf Cuttings
For leaf cuttings, select a healthy, firm leaf and gently twist it off. After removal, allow the leaf to dry and form a callus over the cut end for several days to a week to prevent rot. Once calloused, plant the leaf base partially into a well-draining succulent soil mix, ensuring it remains somewhat upright. Avoid watering immediately; instead, wait a few days before lightly moistening the soil. New roots can appear within weeks, though new plantlets may take months to develop; provide indirect light until new growth is evident.
Common Issues and Solutions
Root rot is a frequent problem, primarily caused by overwatering or insufficient drainage. Signs include yellowing leaves or mushy stems. To address this, remove the plant from its pot, allow roots to dry completely, then replant in fresh, dry, well-draining soil.
Insufficient light leads to etiolation, where the plant stretches and leaves become elongated. Move the plant to a brighter location to correct this. Conversely, intense midday sun, particularly in hot climates, can cause leaf sunburn. Provide afternoon shade or filtered light to protect the plant.
Adromischus herrei is susceptible to common succulent pests like mealybugs and, less frequently, scale insects. Remove these pests by hand or treat with insecticidal soap. Good air circulation also helps deter infestations. The plant may also drop leaves due to stress from heatwaves or fungal issues, which can be mitigated by proper watering and good ventilation.