The Raven ZZ plant (Zamioculcas zamiifolia ‘Raven’) is a cultivar prized for its unique, dark purple-to-near-black foliage. This striking coloration emerges as the leaves mature, initially sprouting as a bright, contrasting lime-green. Originating from the dry grasslands of Eastern Africa, this durable, low-maintenance houseplant is well-suited for beginners.
Ideal Light and Placement
While the Raven ZZ plant is tolerant of low-light conditions, it performs best in bright, indirect light. Placing the plant near an east or west-facing window is ideal, or a few feet away from a south-facing one. Brighter conditions encourage robust growth and help the new green foliage transition quickly into its signature dark color.
Avoid exposing the plant to direct, intense sunlight, especially during midday hours, as the leaves are susceptible to scorching. Scorching manifests as bleached or brown patches on the leaflets. If natural light is limited, the Raven ZZ can survive under artificial lighting, though growth will be significantly slower. The plant prefers ambient temperatures between 65°F and 75°F (18°C and 24°C) and should be kept away from cold drafts or air conditioning vents.
Proper Watering Techniques
The most crucial factor in maintaining a healthy Raven ZZ plant is understanding its unique water storage capabilities. Beneath the soil, the plant possesses thick, tuberous rhizomes that function as water reservoirs, allowing it to survive extended periods of drought. Overwatering is the most common mistake and the primary cause of plant death.
The soil must be allowed to dry out completely between waterings to prevent root saturation. Use the finger test, inserting a finger two inches deep, or a moisture meter to confirm the soil is fully dry before watering.
When it is time to water, soak the soil completely until water drains freely from the pot’s drainage holes. Promptly discard any excess water that collects in the saucer, as standing water will inevitably lead to root rot. During the plant’s dormant period in winter, reduce watering significantly, sometimes to as little as once per month.
Soil Composition and Feeding Schedule
The ideal growing medium for the Raven ZZ plant must be well-draining and airy to support the rhizomes. Standard commercial potting mix is often too heavy and should be amended significantly. Blending the potting soil with materials like perlite, pumice, or coarse sand at a ratio of about one part amendment to two parts soil will enhance drainage and aeration.
Pre-mixed succulent or cacti soil blends are also suitable, as they are formulated specifically for drought-tolerant plants. Since the Raven ZZ is a slow-growing plant, it requires minimal supplemental nutrients. Fertilization should only occur during the active growing season of spring and summer.
Apply a balanced liquid houseplant fertilizer diluted to half the strength recommended on the product label. Feeding the plant once or twice during the entire growing season is sufficient to support its modest growth rate without risking a buildup of salts in the soil.
Identifying and Resolving Common Issues
The vast majority of issues encountered with the Raven ZZ plant can be traced back to incorrect watering practices, which lead to root rot. Symptoms of root rot include yellowing leaves and stems that feel mushy or soft to the touch. If these signs appear, the plant must be unpotted immediately to inspect the rhizomes.
Any soft, brown, or black sections must be trimmed away with a sterile tool. After removing the rotted material, repot the plant in fresh, dry, well-draining soil and withhold water for several weeks.
Pests are relatively uncommon, but occasionally mealybugs or scale insects may appear. These pests can be treated by wiping them off the foliage with a cotton swab dipped in rubbing alcohol diluted with water. Ensuring the plant is not overwatered and receives adequate indirect light are the best preventative measures against both root rot and potential pest infestations.