Hoya Curtisii: A Guide to Care, Propagation, and Blooming

Hoya Curtisii: A Guide to Care, Propagation, and Blooming

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‍Hoya curtisii, also known as Wax Plant, is a delightful and easy-to-grow member of the Hoya family. With its beautiful spade-shaped leaves and stunning silvery variegation, it is a must-have for any plant enthusiast.

In this comprehensive guide, we will explore the care, propagation, and blooming tips for Hoya curtisii, ensuring that you can successfully grow and enjoy this charming plant in your collection.

Understanding Hoya Curtisii

Hoya curtisii is native to the Philippines, Thailand, and Malaysia, which explains its preference for warm and humid conditions. While it can tolerate lower humidity levels, providing a humid environment will help the plant thrive.

In terms of size, Hoya curtisii is relatively small compared to other Hoyas, making it an excellent choice for those with limited space.

Light Requirements

Proper lighting is essential for the healthy growth of Hoya curtisii. Ideally, place the plant in front of a window to provide it with the best possible light. While it can tolerate bright, indirect light, a few hours of direct sunlight will benefit its overall growth.

East or west-facing windows are ideal for Hoya curtisii as they provide the perfect balance of light. However, be cautious with southern windows as they may cause the plant to dry out rapidly.

It’s important to note that Hoya curtisii is more likely to flower when exposed to higher levels of direct sunlight. To encourage blooming, ensure that the plant receives at least half a day of direct sun.

Watering and Soil Requirements

Watering Hoyas, including Hoya curtisii, requires a delicate balance. These plants are highly drought-tolerant and prefer to dry out between waterings. When watering, make sure to thoroughly saturate the soil and allow any excess water to drain out through the pot’s drainage hole.

To determine when to water your Hoya curtisii, regularly check the moisture level of the soil. Insert your finger into the soil, and if the top 1-2 inches feel dry, it’s time to water. However, you can even let the soil completely dry out before watering, as long as you water it thoroughly afterward.

For optimal growth, it is crucial to provide well-draining soil for your Hoya curtisii. Since Hoyas are epiphytes in nature, they require a potting mix that offers excellent drainage. A recommended mixture consists of 2 parts of a quality succulent or cactus mix such as Espoma Organic Cactus mix and 1 part of either perlite or pumice. This combination ensures that the soil drains well and allows the plant to dry out within a reasonable timeframe.

Choosing the Right Pot Size

Hoyas, including Hoya curtisii, can remain in the same pot for several years. However, when it’s time for repotting, it’s essential to choose the correct pot size. Overpotting can lead to prolonged soil drying, which is detrimental to Hoyas’ well-being.

When repotting your Hoya curtisii, follow the rule of going up only one pot size. For instance, if your plant is currently in a 4-inch pot, the next pot should not exceed 6 inches in size. This allows the soil to dry out at an appropriate pace, ensuring the plant’s overall health.

For a step-by-step guide on repotting Hoyas, check out our detailed Hoya repotting guide. You can also find valuable information on selecting the best pot type for your Hoyas.

Fertilizing Hoya Curtisii

To promote optimal growth and flowering, regular fertilization is crucial for Hoya curtisii. A highly recommended fertilizer for Hoyas is Dyna-Gro Grow. This premium, complete fertilizer contains all the essential macro and micronutrients necessary for healthy plant growth.

During the growing season, fertilize your Hoya curtisii regularly. Dilute 1/4 teaspoon of Dyna-Gro Grow per gallon of water and apply it with every watering. This method of dilute fertilization ensures that the plant receives a consistent supply of nutrients.

However, during the winter months when the plant’s growth slows down, cut back or completely withhold fertilizer. This allows the plant to enter a rest period and prepares it for future growth and blooming.

Encouraging Blooming

Hoya curtisii is known for its charming flowers, but they require specific conditions to bloom. By providing the right environment, you can increase the chances of your Hoya curtisii producing lovely blossoms.

Here are some tips to encourage blooming in Hoya curtisii:

  1. Optimal Lighting: Hoya curtisii requires higher levels of light compared to other Hoyas for blooming. Ensure the plant receives at least half a day of direct sunlight.
  2. Rootbound Plant: Hoyas generally prefer tighter pots, and Hoya curtisii is no exception. Allowing the plant to become slightly rootbound can stimulate blooming.
  3. Cooler Evening Temperatures: Although Hoya curtisii should not be exposed to temperatures below 50°F, slightly cooler evening temperatures can help trigger blooming.
  4. Dry Rest Period: During the winter months, provide a dry rest period of 4-5 weeks. This means reducing watering and allowing the soil to dry out. However, monitor the plant closely to ensure it doesn’t suffer from excessive dryness.
  5. Leave Spent Flowers: When your Hoya curtisii blooms, avoid cutting off the spent flowers. Instead, let them drop naturally. Leaving them on the plant encourages future blooming in the same spot.

Following these tips can increase the likelihood of your Hoya curtisii producing beautiful flowers.

Propagating Hoya Curtisii

Propagating Hoya curtisii is a simple and rewarding process. The plant itself provides cues on how to propagate it effectively. Look for aerial roots near the leaves, as these indicate potential rooting points.

To propagate Hoya curtisii, follow these steps:

  1. Take stem cuttings that are approximately 2-4 inches long. Remove the leaves from the bottom one or two nodes, taking care not to damage any aerial roots.
  2. Root the cuttings in water or insert them directly into a well-draining soil mix. If using soil, ensure that it contains about 1/3 perlite for optimal drainage.
  3. Keep the soil relatively moist during the rooting process. If possible, maintain high humidity to facilitate root development. You can create a humid environment by using a clear plastic bag or employing other methods to increase humidity.

By following these steps, you can successfully propagate Hoya curtisii and expand your collection.

Other Hoyas to Explore

If you’re a Hoya enthusiast, Hoya curtisii is just the beginning. There are several other fascinating Hoyas worth exploring. Here are a few notable ones:

  • Hoya obovata: Discover the care tips and unique characteristics of Hoya obovata.
  • Hoya carnosa: Learn about the popular Hoya carnosa and its blooming habits.
  • Hoya linearis: Dive into the intricacies of Hoya linearis, a trailing Hoya species.
  • Hoya compacta: Explore the unique features of Hoya compacta, also known as Hindu Rope.

Each of these Hoyas offers its own distinctive charm and care requirements, making them valuable additions to any plant collection.


Hoya curtisii, with its petite size and stunning foliage, is a wonderful plant to cultivate. By providing the right care, including appropriate lighting, watering, soil, and fertilization, you can ensure its healthy growth. Encouraging blooming in Hoya curtisii requires attention to lighting conditions, pot size, and seasonal variations. Additionally, propagating Hoya curtisii is a satisfying endeavor that allows you to expand your collection.

As you explore the world of Hoyas, remember to consider other captivating species such as Hoya obovata, Hoya carnosa, Hoya linearis, and Hoya compacta. Each of these plants offers its own unique beauty and care requirements.

Now that you have a comprehensive understanding of Hoya curtisii and its care, propagation, and blooming, you can confidently add this delightful plant to your collection. Enjoy the process of nurturing and watching your Hoya curtisii thrive and bloom, bringing beauty and joy to your indoor space.

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