String of Pearls Care Guide
Curio rowleyanus
Quick Answer
The number one thing that kills string of pearls is regular potting soil — it holds too much moisture and the roots rot before you even notice something's wrong. Plant it in a gritty cactus mix, water far less than feels natural, and give it a genuinely bright window. Get those two things right and the rest is easy.
⭐Difficulty
Moderate
☀️Light
Bright indirect to direct
💧Watering
Every 2–3 weeks
🌫️Humidity
Low (30–40%)
🌡️Temperature
55–80°F
📈Growth Rate
Moderate
Toxicity
Source: ASPCA Animal Poison Control
Watering
Summer
Every 2–3 weeks
Winter
Every 3–6 weeks
Method: Allow to dry completely; drought tolerant
Water deeply and then wait until the soil is completely bone dry before watering again — not just dry at the surface, but dry all the way through. In summer, that typically means every 2–3 weeks. In winter, stretch it to every 4–6 weeks without guilt. String of pearls stores water inside those round pearls, so it genuinely prefers to go thirsty over sitting in moisture. When you do water, pour slowly until it runs freely from the drainage hole, then don't water again until you stick a finger 2 inches into the soil and feel nothing. Overwatering is far more dangerous than underwatering here. A slightly wrinkled pearl is recoverable. Mush from root rot is usually not. Signs of overwatering: Pearls feel soft and mushy, stems at the base look translucent or brown. Signs of underwatering: Pearls are shriveled or flat but still firm. A good deep water usually perks them up within 24 hours.
Light Requirements
Bright indirect to direct
String of pearls wants a south- or west-facing window with at least a few hours of direct sun — a bright indirect spot alone usually isn't enough to keep the strands full and the pearls plump. If your apartment doesn't get strong natural light, a grow light set 6–8 inches above the plant for 12 hours a day will do the job and prevent the leggy, sparse growth that frustrates so many growers.
Soil & Potting
Soil: Succulent/cactus mix; very fast draining
Pot: Small pot with drainage; hanging basket
Temperature & Humidity
Temperature: 55–80°F (13–27°C)
Humidity: Low (30–40%)
Fertilizing
Frequency: Once in spring
Type: Diluted succulent fertilizer, half strength
Common Problems
Shriveled pearls → Underwatering. Water deeply.
Mushy pearls → Overwatering or root rot. Let dry out and repot.
Flat/deflated pearls → Needs more water.
Leggy, sparse growth → Insufficient light.
Propagation
Take a 3–4 inch stem cutting, strip the pearls off the bottom inch of the stem, and either lay it on top of moist cactus mix or place it in a small glass of water. If you're rooting in soil, just press that bare stem section lightly against the surface — don't bury it deep. Roots will appear in 2–4 weeks, and once you see new pearl growth, you know it's established. The thing that trips most people up: they plant the cutting too deep or keep the soil too wet while rooting, and the cutting rots before it has a chance. Barely-moist soil is the goal — not wet, not dry, just faintly damp. Water propagation is actually more forgiving for beginners since you can see the roots forming before you commit it to soil.
Seasonal Care Calendar
🌸 Spring
Resume more regular watering as daylight increases. Fertilize once.
☀️ Summer
Brightest growth period. Water every 2 weeks. Can set outdoors in bright indirect light.
🍂 Fall
Reduce watering frequency. Protect from cold as temps drop.
❄️ Winter
Water very infrequently (every 4–6 weeks). Keep in brightest window. No fertilizer.