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Crassula perforata 'String of Buttons'

Crassula perforata

A fascinating architectural succulent where triangular leaves are perfectly stacked and threaded along sturdy stems, creating the illusion of buttons on a string. The blue-green leaves develop striking red edges in bright light, and the plant forms dense, sculptural clusters that add incredible texture to any collection. Its geometric form and reliable growth make it a conversation starter that's surprisingly easy to care for.

Sun

Full sun to partial shade

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Zones

9–12

USDA hardiness

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Height

12-24 inches

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Complete Growing Guide

Light: Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours). Soil: Loam (Silt), Sand. Soil pH: Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage, Occasionally Dry. Height: 1 ft. 0 in. - 2 ft. 0 in.. Spread: 2 ft. 0 in. - 3 ft. 0 in.. Spacing: 3 feet-6 feet. Growth rate: Rapid. Maintenance: Low. Propagation: Division, Leaf Cutting, Stem Cutting.

Harvesting

For String of Buttons, harvest readiness appears when leaves develop their characteristic red edges and feel plump and firm to the touch, indicating peak water content and maturity. Unlike many succulents harvested for single large yields, this cultivar responds best to continuous light harvesting of individual rosettes or short stem sections, which encourages bushier, denser growth rather than depleting the plant. Timing your harvests in spring or early summer maximizes the plant's ability to recover and produce new growth before dormancy sets in, while avoiding late-season harvesting prevents stress during cooler months when growth naturally slows.

Bloom time: Spring

Storage & Preservation

Store Crassula perforata 'String of Buttons' in bright indirect light on a counter or shelf at 65-75°F with low humidity (30-40%). As a living succulent, it doesn't require traditional food storage. To preserve the plant long-term: (1) Propagate from leaf or stem cuttings, storing them dry until roots develop, then potting in well-draining mix; (2) Create offsets by separating mature clusters and allowing cut surfaces to callus for 2-3 days before planting; (3) Overwintering involves reducing water during cool months and maintaining bright light to preserve vibrant red edge coloring.

History & Origin

Origin: South Cape Provinces to KwaZulu-Natal

Advantages

+Attracts: Butterflies, Hummingbirds
+Fast-growing
+Low maintenance

Considerations

-Toxic (Sap/Juice): Low severity
-Causes contact dermatitis

Companion Plants

String of Buttons does best alongside plants that share its water and light demands, which is why Echeveria, Sedum, and Jade Plant (Crassula ovata) make the most sense in a mixed container. All three want their soil bone-dry between waterings and can handle 4–6 hours of direct sun without complaint. One drink serves the whole pot, and nobody sits in moisture longer than it should. Haworthia is worth adding if part of the arrangement gets afternoon shade — it tolerates lower light than the others without needing a separate watering schedule.

Aloe vera and Portulacaria afra both pull their weight for the same reasons: shallow to medium root depth, genuine drought tolerance, and no chemical interference with their neighbors. Around here in coastal Georgia, that kind of mixed planting spends spring through early October outdoors on a south-facing porch, then comes inside before temperatures drop below 40°F — and the stacked rosettes of String of Buttons against the broader paddle leaves of Portulacaria gives you something worth actually looking at.

The problem companions — Ferns, Impatiens, Hostas — need consistent soil moisture and lean toward shade. Put any of them in the same container and you're stuck: water enough for the fern and the Crassula roots stay wet for two weeks straight, which is how root rot starts. It's not about chemical incompatibility; their basic growing conditions don't overlap.

Plant Together

Echeveria

Similar water and light requirements, creates attractive textural contrast

Sedum varieties

Identical care needs and complementary growth habits for succulent arrangements

Jade Plant (Crassula ovata)

Same genus with matching watering schedules and temperature preferences

Haworthia

Compatible drought tolerance and provides visual interest with different leaf patterns

Aloe vera

Similar succulent care requirements and both prefer bright, indirect light

Portulacaria afra

Matching low-water needs and creates nice cascading companion effect

Kalanchoe

Shared preference for well-draining soil and infrequent watering

String of Pearls

Similar trailing habit and identical drought-resistant care needs

Keep Apart

Ferns

Require consistently moist soil which can cause root rot in succulents

Impatiens

Need frequent watering and high humidity that promotes fungal issues in succulents

Hostas

Prefer shade and regular moisture, opposite of succulent requirements

Pests & Disease Resistance

Resistance

Very good with proper care

Common Pests

Mealybugs, aphids, scale

Diseases

Root rot, fungal issues from overwatering

Troubleshooting Crassula perforata 'String of Buttons'

What you'll see, why it happens, and what to do about it.

White cottony clumps in leaf axils or along stems, sometimes with sticky residue on lower leaves

Likely Causes

Mealybugs (Pseudococcidae) — common on succulents grown indoors or in crowded containers
Low airflow and infrequent inspection allowing a small population to establish unnoticed

What to Do

1.Dab individual bugs with a cotton swab soaked in 70% isopropyl alcohol — works on contact
2.Follow up with a spray of diluted neem oil (2 tsp per quart of water) every 7 days for 3 weeks
3.Isolate the affected plant immediately; mealybugs spread fast across a shelf of succulents

Stems soft and mushy at the base, lower leaves dropping with a slight tug, soil staying wet more than 10 days after watering

Likely Causes

Root rot from Pythium or Phytophthora — almost always triggered by overwatering or a pot without drainage holes
Heavy potting mix retaining moisture too long (standard houseplant soil instead of a cactus/succulent blend)

What to Do

1.Unpot the plant, cut away any black or brown mushy roots with clean scissors, and let the root ball air-dry for 24 hours before repotting
2.Repot into a well-draining cactus mix — or cut 40% perlite into standard potting soil — in a terracotta pot with a drainage hole
3.Hold off watering for at least 7-10 days after repotting to let the roots recover

Frequently Asked Questions

Is String of Buttons succulent good for beginners?▼

Yes, absolutely. Crassula perforata is an excellent beginner succulent with very forgiving care requirements. It tolerates neglect well, requires minimal watering (only when soil is completely dry), and thrives with standard succulent care. Its reliable growth and sculptural beauty make it ideal for those new to succulents or houseplants.

Can I grow String of Buttons indoors?▼

Yes, it grows well indoors provided it receives 4-6+ hours of bright light daily, ideally near a south or west-facing window. Without sufficient light, growth becomes leggy. Indoors, reduce watering frequency compared to outdoor plants since evaporation is slower. Ensure good air circulation to prevent moisture-related issues.

How do I propagate String of Buttons?▼

Propagation is simple: remove individual leaves or 2-3 inch stem cuttings, allow cut ends to dry and callus for 2-3 days, then place on well-draining cactus mix. Don't water initially; mist lightly after 1-2 weeks. Roots develop in 3-4 weeks. Alternatively, separate mature offsets from the base and pot individually.

What light conditions bring out the red coloring?▼

Bright, direct sunlight intensifies the striking red edges on the blue-green leaves. Place the plant in full sun (6+ hours daily) for the best color development. Indoor plants under grow lights positioned 6-12 inches away also develop good coloring. Lower light levels result in solid green leaves without the decorative red margins.

How often should I water String of Buttons?▼

Water sparingly—only when soil is completely dry, typically every 2-3 weeks during growing season (spring/summer) and even less frequently in fall/winter. Overwatering is the primary cause of rot in this succulent. In humid climates, extend the interval further. Always use well-draining cactus mix and pots with drainage holes.

Is String of Buttons toxic to pets?▼

No, Crassula perforata is non-toxic to cats and dogs. However, overindulgence may cause mild digestive upset. The bigger concern is the plant's fragile leaves, which pets may damage. Keep it in a secure location away from curious animals to protect both the plant and prevent accidental ingestion of large quantities.