The ‘Ivory Tower’ succulent, identified as Crassula ‘Ivory Tower’ (also known as Crassula Conjuncta or Crassula x perforata ‘Ivory Tower’), is a unique and appealing addition to indoor or outdoor plant collections. This distinctive plant is favored for its architectural form and low-maintenance nature, making it a popular choice for succulent gardens, rock gardens, and container arrangements.
Identifying Your Ivory Tower Succulent
The ‘Ivory Tower’ succulent is recognized by its growth habit, featuring thick, fleshy leaves stacked closely together along an upright stem. These leaves are silvery-green, small, and round, forming a compact pattern. With ample sunlight, the margins of the leaves can develop a deep reddish hue. This plant can reach a height of up to 20 centimeters, with individual leaves growing about 3 centimeters long.
While sometimes confused with Crassula perforata ‘String of Buttons’ due to a similar stacked appearance, the ‘Ivory Tower’ distinguishes itself with fleshier, more compactly arranged leaves. Its structure and coloration make it a versatile plant for standalone display or mixed succulent displays. Mature plants typically grow 15-20 cm (6-8 inches) tall and 20-25 cm (8-10 inches) wide.
Comprehensive Care for Ivory Tower Succulents
Light Requirements
‘Ivory Tower’ succulents thrive in bright, indirect sunlight, which maintains their vibrant coloration and compact growth. Placing them near a south or west-facing window is suitable for indoor environments, though a sheer curtain can filter intense direct rays. If grown outdoors, providing some shade during the hottest parts of the day prevents leaf scorching. Insufficient light can cause the plant to stretch and become leggy, losing its dense form.
Watering Techniques
Proper watering is important for ‘Ivory Tower’ succulents, which are drought-tolerant. The “soak and dry” method is recommended, allowing the soil to dry out completely between waterings. Overwatering is a common issue, leading to root rot and fungal diseases; it is better to underwater than overwater. During cooler winter months, the plant’s water requirements decrease, requiring less frequent watering.
Soil and Potting
A well-draining soil mix prevents waterlogging and root issues for ‘Ivory Tower’ succulents. A commercial succulent and cactus mix amended with perlite, pumice, or coarse sand provides drainage and aeration. Pots with drainage holes, especially porous materials like terracotta, concrete, or ceramic, help excess moisture evaporate. Repot every two to three years, or when root-bound, during the active growing season in spring or summer.
Temperature and Humidity
‘Ivory Tower’ succulents prefer warm to moderate temperatures, between 60°F and 80°F. While they can tolerate brief periods from 40°F to 90°F, protect them from extreme fluctuations and frost. They require low humidity. Excessive moisture can lead to problems, so ensure good air circulation around the plant.
Fertilization
Fertilization is not a frequent requirement for ‘Ivory Tower’ succulents. To encourage growth or improve plant health, apply a balanced, water-soluble houseplant fertilizer once a month during the active growing season (spring and summer). Dilute it to half-strength to prevent nutrient burn. Avoiding fertilization during the plant’s dormant period prevents stress.
Pruning and Maintenance
‘Ivory Tower’ succulents require minimal pruning. Primary maintenance involves removing any dead or yellowing lower leaves to reduce potential hiding spots for pests. If the plant begins to stretch or become leggy from insufficient light, selective trimming of these elongated stems can encourage bushier, more compact growth. Using clean, sharp tools for any pruning tasks helps ensure clean cuts and prevents the introduction of diseases.
Propagating Ivory Tower Succulents
Propagating ‘Ivory Tower’ succulents is done through stem cuttings or by separating offsets (also known as pups) from the mother plant. For stem cuttings, a healthy stem with several leaf sets should be snipped with clean, sharp tools. Offsets, miniature versions of the parent plant, can be gently removed from the base or stem, often with some roots already attached.
Allow the cut end to “callus” or dry for a few days; this forms a protective layer that prevents rot when planted. Once callused, plant the cutting or offset in dry, well-draining succulent soil. Place the new propagation in a bright, warm location, avoiding direct harsh sunlight initially. Water sparingly only after roots develop, which can take a few weeks.
Addressing Common Problems
Etiolation, where the plant stretches and becomes leggy with elongated stems and widely spaced leaves, indicates insufficient light. Move the plant to a brighter location. Leaf discoloration can also occur: scorching or browning from excessive direct sunlight, or becoming soft and yellow from overwatering.
‘Ivory Tower’ succulents are susceptible to common succulent pests such as mealybugs, scale insects, and spider mites. Regularly inspecting the plant helps in early detection. Mealybugs, appearing as small, white, cotton-like masses, can be treated by dabbing them with a cotton swab dipped in rubbing alcohol. For scale insects or spider mites, insecticidal soap or neem oil can be effective, along with physically removing them. Beyond pests, overwatering remains a primary concern, leading to root rot and fungal diseases if the soil remains waterlogged.