Delosperma bosseranum, often called Ice Plant, is a succulent that brings beauty to various garden settings. This plant is a popular choice for its distinctive appearance and resilience, thriving in challenging conditions.
Characteristics of Delosperma Bosseranum
Delosperma bosseranum is a fast-growing succulent native to Madagascar, South Africa, and Reunion. It features numerous long, skinny leaves and, as it matures, develops a bulbous, woody root, or caudex, that can sit above the soil line. This thickened stem can grow up to three centimeters in diameter, with the entire plant reaching about 15 centimeters in height and 30 centimeters in diameter. Its succulent leaves are light green, sometimes taking on purple hues in ample sunlight.
The plant produces small white, daisy-like flowers, primarily in summer. These flowers open during sunny days and close at night. The name Delosperma is derived from Greek words meaning “visible seed,” referring to the exposed seeds within its capsules. This species is also used in succulent bonsai due to its tuber formation.
Growing Delosperma Bosseranum
Delosperma bosseranum thrives in full sun, requiring at least six to eight hours of direct sunlight daily for growth and abundant flowering. While it can tolerate some light shade in extremely hot climates, less sun may lead to sparser growth and fewer blooms.
The right soil composition is essential for this succulent. Delosperma bosseranum requires very well-draining soil, preferring sandy, gritty, or rocky mediums. Heavy clay soils, which retain too much moisture, can lead to root rot and should be avoided. Amending clay soil with sand, perlite, or compost can improve drainage.
Regarding watering, Delosperma bosseranum is drought-tolerant once established. During the first growing season, consistent watering helps establish a strong root system. Afterward, water deeply but infrequently, allowing the soil to dry out completely between waterings. Overwatering causes root rot, so it is better to underwater than overwater. For container plants, allow the top half of the soil to dry out between waterings, and ensure pots have drainage holes to prevent waterlogging.
Delosperma bosseranum tolerates temperatures ranging from 32°F to 95°F (0°C to 35°C). It is cold hardy, with some varieties reliably perennial in USDA Zones 5-9, provided the soil is dry. In colder, wetter climates, ensuring dry conditions during winter, perhaps with gravel mulch, helps prevent winter kill.
Fertilization needs for Delosperma bosseranum are minimal. As succulents, they are not heavy feeders and can become leggy if over-fertilized. A light application of a balanced, slow-release fertilizer once or twice annually, typically in spring and possibly mid-summer, supports healthy growth and blooming. Alternatively, a thin layer of compost provides adequate nutrients.
Propagating Delosperma Bosseranum
Propagating Delosperma bosseranum is commonly achieved through stem cuttings or seeds. For stem cuttings, cut a healthy stem and remove its lower leaves. Allow the cut end to callous over for a few days before planting it in well-draining soil. This callousing prevents rot and encourages successful rooting.
When propagating from seed, sow the tiny seeds on the surface of fine, sandy soil, such as a commercial cactus potting mix. Maintain consistent moisture by misting the soil and covering it with clear plastic to create a humid environment. Seedlings should be placed in bright light, and the soil should not dry out during germination.
Common Challenges and Landscape Uses
While Delosperma bosseranum is a low-maintenance plant, moisture-related challenges can arise. Overwatering is the primary concern, leading to root rot in poorly drained soils. Symptoms include yellowing leaves and wilting. Prevention involves ensuring excellent drainage and allowing the soil to dry out between waterings. Pests are generally minor, but aphids or mealybugs may occasionally appear. These can often be dislodged with a strong spray of water.
Delosperma bosseranum is versatile in landscape design due to its aesthetic qualities and drought tolerance. Its low-growing, mat-forming habit makes it an excellent groundcover, suppressing weeds and preventing erosion, particularly on slopes. It is well-suited for rock gardens, where its daisy-like flowers and succulent foliage add texture and color among stones.
This plant also performs well in containers and hanging baskets, with its trailing growth spilling over edges. Its resilience in hot, dry conditions makes it an ideal choice for xeriscaping, contributing bright blooms to water-wise gardens. Delosperma bosseranum attracts pollinators like bees and butterflies, adding ecological value.