String of Hearts problems & how to fix them

Ceropegia woodii

Drooping, yellowing, brown tips, or a plant that just won’t thrive? Here are the most common String of Hearts problems, what usually causes them, and how to turn things around.

Common problems

Root rot

The water-storing tubers rot readily in soil that never dries out. A fungal or bacterial infection of the roots, almost always triggered by soil staying wet too long. Caught early, most plants recover within a few weeks after repotting; if most roots are already mushy, recovery is uncertain.

Example of Phytophthora root rot on a dug-up root ball, on another plant
Example on another plant

Phytophthora root rot on a dug-up root ball

Photo: Jerzy Opioła · CC BY-SA 4.0 · Wikimedia Commons

Etiolation (insufficient light)

In dim light the hearts shrink, fade to plain green, and space far apart on the vine. The plant is stretching toward light it isn't getting: long gaps between leaves, pale thin growth, and leaning. Stretched growth never compacts again, but with more light all new growth comes in full and sturdy - the plant's future is good.

Example of etiolated seedlings stretching pale toward the light, on another plant
Example on another plant

etiolated seedlings stretching pale toward the light

Photo: சஞ்சீவி சிவகுமார் · CC BY-SA 4.0 · Wikimedia Commons

Overwatering

Yellowing, mushy leaves near the crown are the first sign of a drowning tuber. The soil is staying wet longer than the plant can handle, starving roots of oxygen. If caught before roots start rotting, the fix is simple - let the soil dry out and adjust the routine - and most plants bounce back within 2-3 weeks.

Example of a yellowing lower leaf on a potted Chinese evergreen, on another plant
Example on another plant

a yellowing lower leaf on a potted Chinese evergreen

Photo: Saurav9656 · CC BY-SA 4.0 · Wikimedia Commons

Mealybugs

Mealybugs hide at the vine nodes and around aerial tubers. Slow-moving sap-sucking insects that look like bits of white cotton stuck in leaf joints. They are stubborn but very treatable with repeated spot treatment; expect steady improvement over 3-4 weeks.

Example of a long-tailed mealybug on a leaf, on another plant
Example on another plant

a long-tailed mealybug on a leaf

Photo: D-Kuru · CC BY-SA 3.0 at · Wikimedia Commons

Succulent-specific pests

Root mealybugs hide below the soil line on succulents and cacti — check the root ball when a plant stalls for no visible reason. Mealybugs, scale, and root mealybugs love the crevices and thick leaves of succulents and cacti, sucking sap and weakening the plant. Caught early they are very treatable, but expect a few repeat treatments over 2-3 weeks to break the life cycle.

Example of cottony cochineal scale massed on a prickly pear pad, on another plant
Example on another plant

cottony cochineal scale massed on a prickly pear pad

Photo: Juandev · CC BY-SA 3.0 · Wikimedia Commons

The mistakes that most often kill it

  • Keeping the tuberous base in constantly moist soil.
  • Growing it far from a window — it survives but becomes a sparse green thread.
  • Cold, wet winter conditions that rot the tuber overnight.

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