String of Pearls
Senecio rowleyanus
An enchanting trailing succulent with unique pea-shaped leaves that cascade like a string of green beads from hanging baskets or shelves. This conversation-starter produces tiny white cinnamon-scented flowers and can trail several feet long, making it perfect for adding vertical interest to any succulent collection. Its unusual appearance and easy care make it a social media darling.
Sun
Full sun to partial shade
Zones
9–12
USDA hardiness
Height
12-24 inches
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: Sand. Soil pH: Neutral (6.0-8.0). Drainage: Good Drainage, Occasionally Dry, Very Dry. Spacing: Less than 12 inches. Growth rate: Medium. Maintenance: Low. Propagation: Division, Leaf Cutting, Seed.
Harvesting
String of Pearls doesn't require traditional harvesting since it's purely ornamental, but you'll regularly 'harvest' cuttings for propagation and maintenance. The best time to take cuttings is during active growing season (spring through early fall) when the plant can recover quickly.
Look for healthy stems with plump, firm pearls that show no signs of wrinkling or soft spots. Ideal cutting length is 4-6 inches with multiple nodes visible along the stem. Use clean, sharp scissors to make cuts just above a node on the mother plant—this encourages new growth from that point.
Morning is optimal for taking cuttings when the plant is fully hydrated from overnight recovery. Avoid cutting during the hottest part of the day when the plant may be stressed. The stems should feel firm and the pearls should be taut, not squishy.
When harvesting flowers (those tiny white cinnamon-scented blooms), cut the entire flower stalk once blooms fade. This redirects energy back into pearl and stem production. Handle stems gently as the pearls can detach easily—they're essentially modified leaves designed to store water, not withstand rough handling.
Storage & Preservation
Fresh String of Pearls cuttings require specific handling for successful propagation. After cutting, let stems callous for 24-48 hours in indirect light before placing on soil. This prevents rot at the cut site.
Store unused cuttings in a cool, dry location (65-70°F) for up to one week. Place them on a paper towel in indirect light—never in water or moist conditions. The pearls' water storage capacity allows them to survive this dry storage period.
For long-term preservation, String of Pearls can be dried for craft projects, though this kills the plant material. Hang stems in a dry, dark location for 2-3 weeks until completely desiccated.
Unlike edible plants, there's no need for refrigeration or traditional preservation methods. The plant's succulent nature means it naturally preserves moisture, making fresh propagation material the most valuable 'harvest' from your String of Pearls.
History & Origin
Senecio rowleyanus, commonly known as String of Pearls, originates from the arid regions of South Africa and Namibia, where it naturally grows as a trailing ground cover in semi-desert conditions. The species was formally documented by botanist Gordon Douglas Rowley, after whom it was named, though precise breeding records and introduction dates to horticulture remain sparse in available literature. Its popularity as an ornamental houseplant appears to have accelerated significantly in recent decades through the succulent plant trade rather than through formal breeding programs. The plant's distinctive pea-like leaves represent an adaptation to its native environment, where such morphology aids water storage and drought survival, making it ideally suited for modern indoor gardening without requiring intensive cultivation techniques.
Origin: South Africa
Advantages
- +Attracts: Butterflies, Moths
- +Low maintenance
Considerations
- -Toxic (Leaves): Medium severity
- -Causes contact dermatitis
Companion Plants
String of Pearls pairs well with succulents that share its drought tolerance — Echeveria, Haworthia, Jade Plant, and Burro's Tail all want to dry out between waterings, so grouping them together stops you from overwatering the whole arrangement to keep one moisture-hungry plant happy. Aloe Vera and Zebra Plant put down slightly deeper roots and don't compete much where String of Pearls trails near the surface. Skip Baby's Tears, Ferns, and Impatiens entirely — all three need consistently moist soil, and if you meet their water requirements, you'll have root rot in your pearls within a few weeks.
Plant Together
Jade Plant
Similar water and light requirements, creates attractive succulent grouping
Echeveria
Identical care needs and drought tolerance, complementary rosette form
Burro's Tail
Same trailing growth habit and watering schedule, creates cascading display
Haworthia
Similar low-water needs and bright indirect light preferences
Aloe Vera
Compatible watering frequency and sun exposure requirements
String of Hearts
Similar trailing habit and drought tolerance, attractive textural contrast
Zebra Plant
Same care requirements and creates interesting pattern variation
Panda Plant
Identical water and light needs, provides textural diversity
Keep Apart
Baby's Tears
Requires constant moisture which causes root rot in String of Pearls
Ferns
Need high humidity and frequent watering incompatible with succulent care
Impatiens
Require regular watering and shade, opposite of String of Pearls needs
Pests & Disease Resistance
Resistance
Prone to root rot if overwatered. Sensitive to cold and wet conditions.
Common Pests
Aphids, mealybugs, fungus gnats
Diseases
Root rot, stem rot from overwatering
Troubleshooting String of Pearls
What you'll see, why it happens, and what to do about it.
Pearls shriveling and deflating even after watering
Likely Causes
- Root rot (Pythium spp. or Phytophthora spp.) — roots have died from prior overwatering and can no longer take up moisture
- Soil staying wet too long due to poor drainage or a pot without drainage holes
What to Do
- 1.Unpot the plant and inspect the roots — rotted roots are brown, mushy, and smell off; trim them back to healthy white tissue with clean scissors
- 2.Repot into dry, gritty cactus mix (aim for 50% inorganic material like perlite) in a terracotta pot with a drainage hole
- 3.Hold off watering for 7-10 days after repotting to let any cut roots callous over
White cottony clusters at the base of pearls or where stems meet soil
Likely Causes
- Mealybugs (Pseudococcidae family) — common on succulents, especially in warm indoor conditions with low airflow
- Overfertilizing with nitrogen, which produces soft tissue that mealybugs preferentially target
What to Do
- 1.Dab individual clusters directly with a cotton swab soaked in 70% isopropyl alcohol — kills on contact without harming the plant
- 2.Follow up with a neem oil spray (1 tsp neem per quart of water with a drop of dish soap) every 7 days for 3 weeks
- 3.Isolate the plant from other succulents immediately; mealybugs move fast through a crowded collection
Tiny flies hovering around the soil, pearls looking generally unhappy with no obvious cause
Likely Causes
- Fungus gnats (Bradysia spp.) — larvae live in damp topsoil and chew fine feeder roots, stressing the plant in ways you won't see until damage is done
- Soil staying consistently moist between waterings, which is exactly the breeding condition Bradysia needs
What to Do
- 1.Let the top 2 inches of soil go completely dry between waterings — the larvae can't complete their life cycle in dry medium
- 2.Top-dress with a half-inch layer of coarse horticultural sand to deter adults from laying eggs in the soil
- 3.For an active infestation, drench once with a diluted hydrogen peroxide solution (1 part 3% H2O2 to 4 parts water) to kill larvae on contact