Graptopetalum pachyphyllum aka Bluebean

Taxonomy ID: 6450

Graptopetalum pachyphyllum is a charming, low-growing succulent native to the mountains of central Mexico. First described by Joseph Nelson Rose in 1922, this species belongs to the Crassulaceae family and is commonly known as 'Bluebean' due to its distinctive bluish-green, bean-shaped leaves.

This mat-forming succulent produces erect or decumbent stems that grow up to 20 cm (8 inches) long, becoming woody and brown with age. The fleshy, glaucous leaves are densely packed in small rosettes at the tips of each stem. These rosettes typically reach up to 4.5 cm (1.8 inches) in diameter. The leaves display a silvery bluish-green coloration that develops attractive dark purple or red tips when exposed to cold weather or bright light stress.

In its native habitat, Graptopetalum pachyphyllum grows on shady rocks and cliff faces at elevations between 1,900 and 2,300 meters (6,200-7,500 feet). It is found throughout central Mexico, from Zacatecas and San Luis Potosí in the northeast to Jalisco, Hidalgo, and Querétaro. The species thrives in seasonally dry tropical environments, hiding in crevices or forming loose mats on mountain rocks.

During spring and summer, mature plants produce delicate flowers on tall, slender stalks. The star-shaped blooms are typically white to greenish-white with distinctive dark red banding, though some describe them as yellowish-orange with crimson markings. The flowers have five petals and are quite attractive despite the plant's small size.

Graptopetalum pachyphyllum is valued in cultivation for its compact growth habit, ease of care, and ability to form attractive clusters over time. It is well-suited for rock gardens, containers, fairy gardens, and terrariums. The species has also been used in creating intergeneric hybrids with Echeveria, known as ×Graptoveria, which are popular among succulent collectors. Notably, this species is one of the few succulents reported to have a light, pleasant fragrance.

Common names

Bluebean, Blue Bean, Thick Leaved Graptopetalum

More information about Bluebean

How difficult is it to care for Graptopetalum pachyphyllum?

Graptopetalum pachyphyllum is considered an easy succulent to grow, making it ideal for beginners. It is hardy, low-maintenance, and tolerates some neglect. The main requirements are bright light and allowing the soil to dry completely between waterings. Avoid overwatering, which is the most common cause of problems with this species.

How big does Graptopetalum pachyphyllum grow?

Slow

Graptopetalum pachyphyllum is a compact, low-growing succulent that typically reaches 3-5 inches (7-13 cm) in height. Individual rosettes grow to about 1.8 inches (4.5 cm) in diameter. The stems can extend up to 8 inches (20 cm) but tend to sprawl and form ground-hugging mats. Growth rate is slow to moderate, and over time the plant develops attractive clumps of offsets.

What temperature does Graptopetalum pachyphyllum need?

Graptopetalum pachyphyllum prefers moderate temperatures between 65-75°F (18-24°C). It can tolerate temperatures down to about 25-30°F (-4 to -1°C) briefly but is not frost-hardy. Prolonged exposure to freezing temperatures will damage or kill the plant. In USDA zones 9b-11b, it can be grown outdoors year-round. In colder climates, bring it indoors before the first frost.

Does Graptopetalum pachyphyllum flower?

🌸 Spring to Summer

Yes, mature Graptopetalum pachyphyllum plants produce delicate flowers on tall, slender stalks in spring to summer. The star-shaped blooms have five petals and are typically white to greenish-white with distinctive dark red banding, though some may appear yellowish-orange with crimson markings. The flowers are small but attractive and add seasonal interest to this compact succulent.

How do you propagate Graptopetalum pachyphyllum?

Graptopetalum pachyphyllum is easy to propagate through several methods. The simplest is by separating offsets (baby plants) that form around the base. Stem cuttings also root readily—cut a 2+ inch section, let it dry for 3-5 days to callus, then place on well-draining soil. Leaf propagation works too: remove healthy leaves, let them callus, and place on moist soil until new plantlets emerge. Seeds are possible but slower.

Can Graptopetalum pachyphyllum grow outdoors?

🇺🇸 USDA 9b-11b

Graptopetalum pachyphyllum can grow outdoors year-round in USDA zones 9b-11b where temperatures stay above 25°F (-4°C). It thrives in rock gardens, raised beds, or containers on patios. In colder climates, grow it outdoors during spring and fall but bring it inside before frost. The plant benefits from outdoor conditions in mild weather but needs protection from intense midday sun in summer and freezing temperatures in winter.

How does Graptopetalum pachyphyllum care change by season?

In spring and summer (active growing season), water Graptopetalum pachyphyllum about 1-2 times per week when soil is dry and apply diluted fertilizer monthly. In fall and winter (semi-dormancy), reduce watering to 2-3 times per month and stop fertilizing. Protect from frost in winter—if outdoors, bring inside when temperatures approach freezing. Cold weather often enhances the attractive purple-red leaf tips.

When should you repot Graptopetalum pachyphyllum?

Repot Graptopetalum pachyphyllum every 2-3 years or when it outgrows its container. The best time is in spring at the start of the growing season. Choose a pot only slightly larger than the current one with drainage holes. Use fresh, well-draining succulent soil. This slow-growing species doesn't require frequent repotting and can remain in the same container for extended periods.

What pests and diseases affect Graptopetalum pachyphyllum?

Graptopetalum pachyphyllum can be affected by common succulent pests including mealybugs and scale insects. Treat infestations by quarantining affected plants, wiping pests off with a cotton swab dipped in rubbing alcohol, or using insecticidal soap. Root rot from overwatering is the most common disease problem. Ensure excellent drainage and allow soil to dry completely between waterings to prevent fungal issues.

Does Graptopetalum pachyphyllum have a fragrance?

Yes, Graptopetalum pachyphyllum is notable for being one of the few succulents with a pleasant fragrance. It produces a light, subtle scent that makes it a unique addition to any succulent collection. The fragrance is not overpowering and is most noticeable when in proximity to the plant.

Why are my Graptopetalum pachyphyllum leaves turning yellow?

Yellow leaves on Graptopetalum pachyphyllum typically indicate overwatering or poor drainage. Check that the soil is drying completely between waterings and that the pot has drainage holes. If the soil stays wet, root rot may be developing. Other causes include insufficient light or natural leaf shedding as the plant grows. Remove affected leaves and adjust watering frequency.

Why is my Graptopetalum pachyphyllum drooping?

Drooping in Graptopetalum pachyphyllum usually indicates watering issues—either overwatering causing root rot or underwatering leading to dehydration. Check the soil: if wet and the plant is soft and mushy, reduce watering and check for root rot. If the soil is bone dry and leaves are wrinkled, give the plant a thorough watering. Insufficient light can also cause weak, leggy growth that may droop.

What is the region of origin of Bluebean

Bluebean’s native range is Mexico and Arizona.

What are the water needs for Bluebean

💧 Dry
Bluebean does best in dry soil and should only be watered sparingly.

What is the right soil for Bluebean

Light sandy
When growing the Bluebean, it's important to use a potting soil that is well-draining and does not retain excessive moisture. An optimal soil mix should contain a high proportion of perlite or vermiculite for good drainage and some organic matter for nourishment. Simply add a few scoops of perlite to regular cactus soil to achieve this.

What is the sunlight requirement for Bluebean

Bluebean requires abundant, bright, and direct light to thrive. The best placement for this plant is within one foot of a window to ensure it receives enough light. If you live in an area with more extreme weather, such as hot summers or cold winters, you may need to adjust the placement of the plant accordingly. During hot summer months, it is important to place the plant away from full sun, as this can cause the leaves to yellow or burn. During cold winter months, it is best to move the plant closer to the window to take advantage of the extra light that can help it survive. By keeping an eye on the current weather in your area, you can make sure your Blue Bean is always in the right place to thrive.

What's the right humidity for Bluebean

Bluebean plants thrive in dry environments, however, if you choose to provide extra humidity or mist your plant, the lingering water on the leaves can create an ideal environment for certain types of harmful fungi.

How to fertilize Bluebean

The Bluebean grows at a slow pace and doesn't require any supplementary fertilizers. By renewing its potting soil once a year, it should receive enough nourishment. Remember, plants obtain their energy from sunlight, not fertilizers.
Cat approves this plant

Is Bluebean toxic to humans/pets?

Ploi lacks confirmed information on the toxicity of this plant. If you, a relative, or your pet accidentally consume plant material with unknown toxicity, it's best to consult a medical expert.

More info:
Wikipedia GBIF