Sand Rebutia Rebutia arenacea
ABOUT
Rebutia arenacea, commonly known as the Silky Ball Cactus, is a small, globular cactus with a distinctive appearance characterized by dense, creamy-white spines that give it a soft, velvety look. The spines are quite short and densely packed, which can sometimes almost obscure the green body of the cactus underneath. The plant produces bright orange to red flowers that emerge from the crown and contrast beautifully against its light spination. These blooms are funnel-shaped and can be quite striking when the cactus is in full flower. The Silky Ball Cactus often produces offsets, forming small clusters that enhance its decorative appeal. The overall charm of this plant lies in its compact, rounded shape, the snowy appearance given by its spines, and the vibrancy of its flowers.
About this plant
NamesFamily
Cactaceae
Synonyms
Sand-loving Rebutia, Hairy Rebutia
Common names
Rebutia arenacea, Mediolobivia arenacea, Echinopsis arenacea, Aylostera arenacea, Sulcorebutia arenacea, Weingartia arenacea
ToxicityTo humans
The plant known as Rebutia arenacea, commonly referred to as Crown Cactus, is not considered toxic to humans. There are no known toxic effects from ingesting this plant. However, as with any non-food plant, ingestion of large quantities could potentially cause stomach discomfort, vomiting, or diarrhea due to the plant material's physical properties, rather than its chemical toxicity.
To pets
Crown Cactus (Rebutia arenacea) is also not known to be toxic to pets. There are no specific symptoms of poisoning associated with this plant since it is not poisonous. Similar to humans, if a pet were to ingest part of the plant, they might experience mild gastrointestinal upset, but this would likely be due to the mechanical irritation from the plant material rather than chemical toxicity.
CharacteristicsLife cycle
Perennials
Foliage type
Evergreen
Color of leaves
Varies
Flower color
Varies
Height
0.3 feet (10 cm)
Spread
0.3 feet (10 cm)
Plant type
Cactus
Hardiness zones
5
Native area
Bolivia
Benefits
General Benefits- Ornamental Value: Rebutia arenacea, commonly known as the Sand Rebutia, is prized for its attractive, brightly colored flowers that can add aesthetic appeal to gardens and indoor spaces.
- Easy to Care For: The Sand Rebutia is a low-maintenance plant that is easy to grow, making it suitable for beginner gardeners or those with limited time.
- Suitable for Small Spaces: Being a compact and small-sized cactus, it is ideal for cultivation in small pots or terrariums, making it perfect for small gardens or indoor areas with limited space.
- Drought-Tolerant: As a succulent, Rebutia arenacea is extremely drought-tolerant, requiring minimal watering and able to survive in arid conditions.
- Propagates Easily: It can be easily propagated from offsets or seeds, allowing plant enthusiasts to share and spread this species with friends and fellow gardeners.
Medical PropertiesThis plant is not used for medical purposes.
Air-purifying QualitiesThis plant is not specifically known for air purifying qualities.
Other Uses- Terrarium inclusion: Rebutia arenacea, commonly known as the Sand Cushion Rebutia, can add unique texture and color contrast when used in small terrarium or miniature garden arrangements.
- Education and research: This cactus can be utilized by educational institutions for studies in plant adaptation and survival strategies in arid environments, as it is native to high altitude regions with poor soil conditions.
- Photography subject: Owing to its vibrant flowers and symmetrical form, the Sand Cushion Rebutia is an excellent subject for botanical photography and macro imagery.
- Stress relief: Tending to and caring for Rebutia arenacea can be a form of stress relief for plant enthusiasts, offering a tranquil horticultural experience.
- Artistic inspiration: Artists and designers can draw inspiration from the plant's floral display and structural form for artwork, patterns, and textile designs.
- Bonsai companion: Though not a traditional bonsai plant, the Rebutia arenacea can be grown alongside bonsai trees in arrangements to provide understory interest and scale contrast.
- Cultural events: This cactus can be showcased in cultural events and garden shows that focus on succulents and cacti, highlighting unique varieties and their care.
- Feng shui: Some practitioners of feng shui might incorporate the Rebutia arenacea into their space design, believing in the positive energy that living plants can bring to an environment.
- Stop-motion animation: The slow growth and distinct appearance of these cacti can be used as charming elements in stop-motion animation projects.
- Seasonal gifts: With its bright and colorful blooms, the Sand Cushion Rebutia can be gifted during special occasions, offering a more enduring alternative to traditional floral bouquets.
Interesting Facts
Feng ShuiThe Crown Cactus is not used in Feng Shui practice.
Zodiac Sign CompitabilityThe Crown Cactus is not used in astrology practice.
Plant Symbolism- Resilience: Rebutia arenacea, commonly known as the Crown Cactus, often symbolizes resilience as it thrives in harsh, rocky environments, adapting to intense sunlight and scarce water.
- Purity: The bright and striking flowers of the Crown Cactus are sometimes seen as a symbol of purity and innocence, standing out against the plant's spiny defenses.
- Beauty in Adversity: This cactus' ability to produce beautiful flowers in adverse conditions lets it represent the concept that beauty and joy can be found even in difficult situations.
- Adaptability: Just as the Crown Cactus adapts to its arid environment, it symbolizes the ability to adjust to changing circumstances and survive.
- Protection: With its spiny surface, the Crown Cactus could symbolize a need for setting boundaries or a reminder to protect oneself from external threats.
WaterFor the Crown Cactus (Rebutia arenacea), water should be provided carefully to avoid waterlogging its roots. During the growing season, in spring and summer, watering should be done when the top inch of soil feels dry, which could be approximately every 7-10 days, using around 4-6 ounces of water each time. In the dormant winter months, reduce watering to once a month or less, providing only enough water to prevent the soil from completely drying out. Ensure the pot has good drainage and that excess water is allowed to escape to avoid root rot.
LightThe Crown Cactus thrives in bright, indirect sunlight. A south-facing or east-facing window with a sheer curtain to diffuse intense sunlight is ideal. Avoid placing the Crown Cactus in direct, harsh sunlight, especially during the hot midday hours, to prevent sunburn on its delicate skin.
TemperatureThe Crown Cactus prefers a warm environment with temperatures ranging from 50°F to 80°F. The minimum temperature that the plant can survive is around 40°F during its dormant winter period. However, for optimal growth, maintaining a room temperature between 70°F and 75°F is ideal.
PruningPruning the Crown Cactus is typically unnecessary due to its naturally compact growth habit. However, if you need to remove dead or damaged spines, do so with care using tweezers or a gentle brush. The best time for any removal is during the growing season when the cactus is most resilient.
CleaningAs needed
SoilSand Dollar Cactus prefers a well-draining soil mix with coarse sand or pumice, regular potting soil, and compost in equal parts, with a slightly acidic to neutral pH around 6.0 to 7.5.
RepottingSand Dollar Cactus needs repotting every 2 to 3 years or when it outgrows its pot to prevent root crowding and to refresh the soil.
Humidity & MistingSand Dollar Cactus thrives best in low to moderate humidity conditions, typical of arid environments, but can tolerate some variation within a home environment.
Suitable locationsIndoor
Place Sand Dollar Cactus near a sunny window; water sparingly.
Outdoor
Plant in well-draining soil; full to partial sun.
Hardiness zone
9-11 USDA.
Life cycleRebutia arenacea, commonly known as the Sand Rebutia, begins its life as a seed that germinates in well-draining soil with warmth and indirect sunlight. Upon sprouting, it develops a small green shoot and a rudimentary root system. During the juvenile stage, the cactus forms a spherical shape and undergoes a period of rapid growth, developing small spines and flesh that stores water. As it matures, the Sand Rebutia may produce offsets or "pups" at its base, which can be separated to propagate new plants. Once mature, typically after several years, it produces vibrant flowers in spring or early summer which, when pollinated, produce seeds to complete the life cycle. With proper care, Rebutia arenacea can live for decades, continuing to flower annually.
PropogationPropogation time
Spring-Early Summer
The Rebutia arenacea, commonly known as the Sand Rebutia, can be propagated effectively from seeds. The best time to sow seeds is during the spring or early summer, when temperatures are warm and conducive to germination. Sow the seeds in a well-draining soil mix, lightly covering them with a layer of sand or fine grit to prevent them from being displaced by water. Keep the soil consistently moist but not waterlogged and maintain a temperature around 70°F (approximately 21°C) to encourage germination. Once seedlings appear, provide plenty of light and gradually reduce watering to allow for a strong root system to develop. Over time, as the seedlings grow and become more robust, they can be potted on into individual pots. This method favors the natural growth cycle of the plant and often results in strong, healthy specimens.
