Sweetheart plant

Origin

The Sweetheart Plant (Hoya kerrii) is a low-maintenance succulent instantly recognized by its distinctive heart-shaped leaves. Often also called the 'Valentine Hoya', it is a popular gift around Valentine's Day meant to symbolize love and devotion.

Native to Southeast Asia, the plant first gained international attention in 1911 when it was introduced to the botanical collection at Kew Gardens in the UK.

In its natural habitat, a sweetheart plant is a vining climber that eventually forms a thick, bushy trail of green hearts, making mature plants perfect for hanging baskets. However, in garden centers, you are most likely to find them sold as a single rooted leaf planted upright in a tiny pot.

The "single leaf" trap

If you bought a sweetheart plant as a single heart stuck in the soil, you need to know a crucial botanical quirk: it will likely never grow any bigger.

To produce a new vine or additional leaves, a plant needs a specific type of stem tissue called a "node", which contains a dormant growth bud. When growers propagate these single leaves for Valentine's Day, they often just snip the leaf off the stem and stick it in soil. Because hoya leaves can easily grow roots on their own, the leaf survives and stays green, but without a piece of the original stem attached, it physically lacks the ability to ever push out a new shoot or new leaves.

It becomes a "zombie leaf". It is alive, rooted, and healthy for a while, but it is trapped in its current form forever. If you want a Hoya kerrii that will actually grow into a trailing vine, you must buy a plant that already has multiple leaves on a visible stem, or ensure your single-leaf cutting includes a chunk of the original vine.

In rare cases, you might actually see a new shoot emerge from the soil next to a single potted leaf. This happens when the grower accidentally included a tiny piece of the main stem (and its dormant bud) below the soil line when taking the cutting. If you spot new growth, congratulations! Your plant has exactly what it needs to eventually develop into a full trailing vine.

Care

Sweetheart plants have thick, succulent leaves that store water, so they generally need fairly infrequent watering. Let the soil dry out between waterings, as standing water or soggy potting mix quickly leads to root rot. Always choose a pot with drainage holes so excess moisture can escape easily.

While these plants can tolerate lower light, they do much better in bright, indirect light with partial direct sun in the morning or late afternoon. Good lighting is essential if you want the plant to have a chance of blooming.

When a mature vine flowers, it produces clusters of small, star-shaped blossoms that emerge from specialized woody stalks called bloom spurs (or peduncles). If your plant develops these spurs, never cut them off after the flowers fade and drop. Unlike most other flowering plants, Hoyas produce new flowers from the exact same spurs year after year. Pruning them off forces the plant to waste energy growing brand-new spurs before it can bloom again.