Common Name: Heart-Leaf Hoya, Silver Hoya
Scientific Name: Hoya krohniana
Family: Apocynaceae
Hoya krohniana is a delightful, compact species of Hoya known for its small, heart-shaped leaves. The leaves are typically dark green, thick, and waxy, with some varieties displaying silver flecks or a full silver sheen, often referred to as Hoya krohniana 'Silver'. The plant has a trailing growth habit, making it perfect for hanging baskets or trailing over the edge of a shelf. The stems can become woody over time, adding to its visual interest.
Flowering:
Hoya krohniana produces small clusters of star-shaped flowers that are white or creamy in color. These flowers are fragrant, typically blooming in the warmer months. The flowers are smaller compared to other Hoya species but are just as charming.
Care Information:
Light:
Thrives in bright, indirect light. It can tolerate lower light levels, but growth may slow, and flowering might be less frequent.
Avoid direct sunlight, especially in the afternoon, as it can scorch the leaves.
Watering:
Water when the top 1-2 inches of soil are dry. Hoya krohniana prefers its soil to dry out slightly between waterings.
Reduce watering during the winter months when the plant is not actively growing.
Overwatering can cause root rot, so ensure the pot has good drainage.
Humidity:
Prefers moderate to high humidity but can adapt to average household humidity levels.
Consider misting the plant or using a humidity tray to maintain moisture around the leaves, especially in drier environments.
Temperature:
Ideal temperature range is between 60-80°F (16-27°C).
Keep the plant away from cold drafts, and avoid temperatures below 50°F (10°C).
Soil:
Use a well-draining, airy potting mix. A mix formulated for orchids or succulents, with added perlite, pumice, or orchid bark, works well.
The plant prefers slightly acidic to neutral soil.
Fertilization:
Feed with a balanced, water-soluble fertilizer every 4-6 weeks during the growing season (spring and summer).
Reduce feeding during the fall and winter months.
Pruning:
Prune lightly to maintain shape and encourage bushier growth. Trim any dead or yellowing leaves to keep the plant healthy.
Pruning can also encourage the plant to produce more flowering spurs.
Repotting:
Repot every 2-3 years or when the plant becomes root-bound. Choose a pot that is only slightly larger than the current one, as Hoya krohniana prefers being slightly pot-bound.
Use a shallow pot with good drainage.
Propagation:
Hoya krohniana can be propagated through stem cuttings. Take cuttings with 2-3 nodes, allow them to callus for a day, and then plant in a well-draining mix.
High humidity and warm temperatures will improve the success rate of rooting.
Toxicity:
Hoya krohniana is non-toxic to pets and humans, making it a safe choice for homes with animals and children.
With its delicate, heart-shaped leaves and easy-going nature, Hoya krohniana is a charming addition to any indoor plant collection. It’s perfect for those who love trailing plants and is sure to bring a touch of elegance to any space.