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Plant care

String of Turtles (Trailing Peperomia) care

Peperomia prostrata

Also called String of Turtles, Trailing Peperomia, Mini Turtle Plant.

RHS H1bUSDA 10–12Pet-safeIndoor Stems trail 30–45 cm (12–18 in)

Watering rhythm

7-10days

Every 7–10 days in summer; every 10–14 days in winter

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Light

Bright indirect light (just back from a sunny window)

Soil

Light, sharply draining mix

Humidity

50–70%

Temp

18–26°C

Pet safety

Pet-safe

Mature size

Stems trail 30–45 cm (12–18 in)

Care at a glance

Light

String of Turtles is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Prefers bright, indirect light near a window; insufficient light causes the distinctive shell-like leaf markings to fade and vines to stretch thin. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water string of turtles every 7–10 days in summer; every 10–14 days in winter. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Allow the top few centimetres of soil to dry before watering; the semi-succulent leaves retain some moisture, but the plant is more sensitive to underwatering than larger-leaved species.

Soil and pot

String of Turtles grows best in light, sharply draining mix. Use a blend of 70% peat-free houseplant compost, 15% perlite, and 15% fine orchid bark; good aeration at the roots is essential to prevent the rot to which fine roots are prone. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

String of Turtles sits happiest at around 50–70% humidity and 18–26°C (65–78°F). High humidity mimics its rainforest origin; terrariums or covered glass containers maintain the moisture levels this plant appreciates, though adequate airflow must be maintained to prevent fungal issues. If you keep the room above 18–26°C year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed string of turtles sparingly. Apply a diluted balanced liquid fertiliser monthly during the growing season (spring to early autumn); this slow grower needs very little feed and excess fertiliser causes salt build-up. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on string of turtles in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Yellowing leaves and edema — Overwatering is the primary threat; excess water causes yellow leaves, soft stems, and corky edema lesions on leaf surfaces. Let the top layer of soil dry between waterings and ensure the pot has drainage holes.
  • Mealybugs and fungus gnats — Mealybugs cluster along nodes and under tiny leaves; treat with alcohol swabs or diluted neem oil. Fungus gnats breed in consistently wet topsoil — allowing the surface to dry between waterings breaks their life cycle.
  • Leaf shrivelling and vine dieback — Underwatering causes the small leaves to shrivel and individual stems to die back from the tips; fine trailing stems dry out faster than thicker species, especially in warm, dry indoor air.

Propagation

Take 3–5 cm stem cuttings with 2–3 nodes and root in water or a moist perlite/compost mix; enclose in a clear plastic bag or place in a closed terrarium to maintain humidity. Roots typically develop in 3–6 weeks. Laying stem sections flat on moist substrate also produces new plants. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

String of Turtles is pet-safe. The ASPCA lists multiple Peperomia species as non-toxic to cats and dogs; no toxic principles are identified for the genus. Trailing vines may attract cat attention but pose no poisoning risk. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

String of Turtles care — frequently asked questions

What is the common name for Peperomia prostrata?

Peperomia prostrata is most commonly called String of Turtles, but it is also known as String of Turtles, Trailing Peperomia, Mini Turtle Plant. The names refer to the same species, so care instructions for String of Turtles apply identically to anything sold as Trailing Peperomia.

How much light does string of turtles need?

String of Turtles grows best in bright indirect light (just back from a sunny window). Prefers bright, indirect light near a window; insufficient light causes the distinctive shell-like leaf markings to fade and vines to stretch thin.

How often should I water string of turtles?

Water string of turtles every 7–10 days in summer; every 10–14 days in winter. Allow the top few centimetres of soil to dry before watering; the semi-succulent leaves retain some moisture, but the plant is more sensitive to underwatering than larger-leaved species. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is string of turtles toxic to cats and dogs?

String of Turtles is pet-safe. The ASPCA lists multiple Peperomia species as non-toxic to cats and dogs; no toxic principles are identified for the genus. Trailing vines may attract cat attention but pose no poisoning risk.

What USDA hardiness zone does string of turtles grow in?

String of Turtles is rated for USDA zone 10–12 (indoor in most climates) and RHS hardiness H1b. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

String of Turtles deep-dive guides

Every aspect of string of turtles care, each with its own calibrated guide:

Featured in these plant shortlists

String of Turtles qualifies for 11 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

String of Turtles is also known as String of Turtles, Trailing Peperomia, and Mini Turtle Plant.