The term "Hoya heart" is commonly associated with certain species or cultivars of the Hoya genus, which are popular for their trailing vines and heart-shaped leaves. One specific plant that fits this description is often known as the "Hoya kerrii" or "Hoya sweetheart plant." Here are some details about the Hoya kerrii, which is commonly referred to as the Hoya heart:

1. Leaves: The leaves of Hoya kerrii are thick, succulent, and shaped like hearts, hence the common name "sweetheart plant" or "Hoya heart." The leaves are typically green, but variegated forms with creamy edges or splashes may also be available.

2. Growth Habit: Hoya kerrii is a trailing or vining plant, making it suitable for hanging baskets or allowing it to cascade from shelves. The heart-shaped leaves are often the main attraction.

3. Light: Provide bright, indirect light for the Hoya heart plant. It can tolerate some direct sunlight, but excessive sun exposure may cause leaf burn.

4. Temperature: Hoya kerrii prefers temperatures between 60-80°F (15-27°C). It can tolerate slightly cooler temperatures but should be protected from frost.

5. Watering: Allow the top inch or two of the soil to dry out between waterings. Water thoroughly but avoid waterlogged conditions. Hoya plants are drought-tolerant, and they prefer slightly drier soil.

6. Soil: Use a well-draining potting mix, such as one formulated for orchids or succulents. The mix should provide good aeration and drainage.

7. Humidity: Hoya plants can adapt to average indoor humidity levels, but they appreciate slightly higher humidity. Regular misting or placing a tray of water near the plant can be beneficial.

8. Fertilization: Feed the Hoya heart plant with a balanced liquid fertilizer every 4-6 weeks during the growing season (spring and summer). Reduce fertilization in the fall and winter.

9. Pruning: Prune the plant to control its size and shape. Hoya kerrii can be propagated from stem cuttings, and pruning can encourage branching.

The Hoya heart (Hoya kerrii) is a beloved plant for its charming heart-shaped leaves and is often given as a gift to symbolize love and affection. With proper care, it can make an attractive and low-maintenance addition to your indoor plant collection.