Yellow leaves on sweetheart plant: causes and fixes

Hoya kerrii

Quick answer

Yellow leaves on your sweetheart plant have a few possible causes, and on this plant the likeliest is overwatering and rot at the base.

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Most likely cause

Overwatering & rot at the base

How to tell

The soil stays wet for days, and the rot starts low: a soft, discolored patch at the base rather than one particular old leaf. Small dark flies around moist potting medium may be fungus gnats. They suggest conditions suitable for breeding, without proving that the surface never dries.

The fix

Water according to moisture, only when the top 5 cm (2 in) of soil feel dry. Check drainage and do not add water just because a tip is brown or a calendar says it is time. Remove rotten roots and replace soggy mix. For rescue cuttings, wear gloves against irritant sap and use healthy stem tissue with a node. Allow the cut to callus, then root in airy, lightly moist medium. A lone leaf without a node cannot make a new vine. Wear gloves before cutting or taking cuttings. The milky sap can irritate skin. Wash your hands after handling, and avoid touching your eyes.

Other possible causes

Not a match? Compare the signs below to find the one you have.

Too little light

How to tell

The yellowing comes with pale, stretched new growth leaning toward the nearest window. That combination shows that the spot is too dim for a sweetheart plant.

The fix

Move it to a brighter spot, but keep it out of harsh midday sun, which scorches.

Thirst (underwatering)

How to tell

The soil is bone dry, and the yellowing arrives alongside wrinkled heart leaves rather than soft, mushy growth.

The fix

If the soil is dry, water thoroughly (every 11 to 17 days in summer is the usual pace for a sweetheart plant), then settle into feeling the soil before every watering rather than watering on a fixed day.

Hungry (but rarely the real culprit)

How to tell

Sweetheart plant grows slowly and needs very little feeding, so a uniform pale-yellow fade after many months without any is possible, but check watering and light first: those are far more common on this plant.

The fix

Use a cactus and succulent fertilizer at half the strength on the label, about every 14 days while it’s actively growing. Overfeeding a slow grower like this does more harm than skipping it.

Simple old age

How to tell

An older, lower leaf slowly yellows or shrivels on its own while new growth looks plump and healthy. That’s normal turnover on a sweetheart plant, not a symptom.

The fix

Nothing is wrong. Remove the spent leaf once it comes away easily and carry on.

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Last reviewed: 2026-10-16