String of Pearls vs String of Bananas is not a difficult comparison once you know the key facts — but it’s a comparison worth making before you buy, because these two popular trailing succulents have meaningfully different care demands despite looking similar at a glance. One is beautiful and finicky. The other is beautiful and surprisingly easy. Knowing which is which can save you from replacing a dead plant for the third time.
What Are They? The Taxonomy
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Both trailing succulents need excellent drainage; a shallow terracotta pot with drainage works with their shared need to dry between waterings.
Both String of Pearls and String of Bananas belong to the genus Curio (formerly classified as Senecio — you’ll still see them listed under Senecio widely). They are succulent plants native to arid and semi-arid regions of southern Africa, and their trailing, bead-like stems make them popular choices for hanging baskets and high shelves.
String of Pearls is Curio rowleyanus (formerly Senecio rowleyanus). Its leaves are modified into near-perfect spheres — round, succulent beads that store water. A healthy specimen looks like a cascade of green marbles tumbling over the edge of a pot.
String of Bananas is Curio radicans (formerly Senecio radicans). Its leaves are banana-shaped — longer, slightly curved, with a pointed tip. The leaf shape is a little more elongated and irregular than the perfect sphere of String of Pearls, but the trailing habit and succulent stems are very similar.
Both produce small, daisy-like flowers with a distinctive cinnamon scent — though they bloom infrequently indoors without a period of cooler temperatures to trigger flowering.
Identification: Telling Them Apart
The leaf shape is the definitive identifier:
- String of Pearls: Round, spherical leaves — perfectly circular in cross-section, like peas or marbles
- String of Bananas: Elongated, curved, banana-shaped leaves with a semi-translucent stripe (the “window” that allows light into the leaf interior)
The vines look similar — thin, trailing stems with leaves spaced evenly along them. String of Bananas vines tend to trail more readily and cascade more quickly than String of Pearls.
Full Comparison Table
| Feature | String of Pearls (Curio rowleyanus) | String of Bananas (Curio radicans) |
|---|---|---|
| Leaf shape | Round sphere | Elongated banana/teardrop |
| Leaf size | 6–8mm diameter | 12–20mm long |
| Light needs | Bright indirect; some direct OK | Bright indirect; adaptable |
| Watering tolerance | Low — very easily overwatered | Moderate — more forgiving |
| Low-light tolerance | Poor | Slightly better |
| Growth rate | Slower | Faster — trails more readily |
| Difficulty | Moderate-difficult | Easy-moderate |
| Propagation ease | Easy (node cuttings) | Easy (node cuttings) |
| Pet toxicity | Mildly toxic | Mildly toxic |
| Cinnamon-scented flowers | Yes | Yes |
| Best for | Experienced succulent growers | Beginners; fast trailing displays |
Care Requirements: Where They Differ
Watering: The Critical Difference
This is where the most meaningful divergence lies, and where most String of Pearls failures originate.
String of Pearls is extremely sensitive to overwatering. Its spherical leaves store a significant amount of water, and the plant’s root system is shallow and fine. Even brief periods of consistently moist soil can trigger root rot — and by the time you notice the mushy, translucent beads or the smell of rot, the damage is usually severe. The recommended approach is to water thoroughly, then allow the soil to dry out almost completely before watering again. In most homes, this means watering every 2–3 weeks in summer and once a month or less in winter.
String of Bananas is more forgiving. Its banana-shaped leaves store less water per leaf than the spherical pearls, and the plant has slightly more tolerance for irregular watering. It still wants well-draining soil and a dry period between waterings, but it’s less likely to collapse from a single extra watering session. If you’ve killed String of Pearls from overwatering before, String of Bananas is the safer choice.
Light: Both Need Bright Conditions
Both plants need bright light to thrive. They are succulents from sun-exposed habitats, and indoor low-light conditions cause them to etiolate — the stems become long and sparse as the plant stretches toward the light, producing unattractive gaps between leaves.
A south- or west-facing window with direct sun for a few hours in the morning or late afternoon is ideal for both. If you’re growing them in a spot that only gets indirect light, String of Bananas will handle it somewhat better than String of Pearls, but neither will produce the dense, lush trailing growth that makes these plants so attractive.
Soil: Both Need Excellent Drainage
Both plants need a well-draining succulent or cactus mix. Standard potting soil retains too much moisture. Mix regular potting soil with 50% coarse sand or perlite, or use a commercial cactus mix. Avoid pots without drainage holes — this is more likely to kill these plants than any other single mistake.
Temperature and Humidity
Both prefer dry air and temperatures between 65–85°F. They are not frost-tolerant. High humidity (above 60%) is not ideal — it promotes fungal issues and root rot. Average home humidity is typically fine.
Propagation: Easy for Both
Propagating both plants is simple and identical in method:
- Cut a healthy stem segment 3–4 inches long
- Allow the cut end to callus over for 24–48 hours in a dry location
- Place the cutting on top of — not buried in — moist succulent mix
- Mist lightly every few days until roots develop (typically 2–4 weeks)
- Once rooted, water as you would a mature plant
Multiple cuttings placed together in one pot create the full, lush appearance these plants are known for. A single cutting in a pot looks sparse.
Toxicity Warning
Both String of Pearls and String of Bananas are mildly toxic to pets and humans if ingested. They can cause gastrointestinal upset, drooling, and lethargy in dogs and cats. Keep them out of reach of pets and children — which is easy given their trailing habit, since they’re typically displayed in elevated hanging baskets or on high shelves.
The Verdict: Which Should You Choose?
For beginners: choose String of Bananas. It is faster-growing, more tolerant of irregular watering, and more adaptable to slightly less-than-ideal conditions. You’ll get the trailing succulent aesthetic with a significantly lower chance of failure.
For experienced succulent growers: String of Pearls offers the more iconic, dramatic look that has made it one of the most photographed houseplants on social media. The perfectly spherical bead-like leaves are genuinely unlike anything else. If you understand succulent watering and have the right light, it’s a rewarding plant to grow. If you’re still calibrating your succulent care instincts, start with String of Bananas and graduate to Pearls once you’re confident.
What about String of Dolphins? This is a hybrid between Curio rowleyanus and Curio articulatus with leaves shaped like leaping dolphins. It’s slightly more challenging than Bananas but has a uniquely playful aesthetic. It falls between the two in difficulty.
Common Mistakes to Avoid
- Watering on a fixed schedule: Both plants need watering based on soil dryness, not calendar date
- Pots without drainage: Non-negotiable for both species — drainage is essential
- Repotting frequently: Both prefer to be slightly pot-bound; unnecessary repotting disturbs fine roots
- Too much shade: Etiolation (stretching) is irreversible on existing stems; only new growth in better light will be compact
