Cornus hongkongensis — an easy houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Cornus hongkongensis

Cornus Hongkongensis

Updated · 41 observations
ON THIS PLANT

Cornus hongkongensis (sometimes called Benthamidia hongkongensis, Dendrobenthamia hongkongensis, or Hong Kong dogwood) is a species of evergreen dogwood native to China, Laos, and Vietnam. It grows to 15 meters in height and blooms in late spring to early summer, exhibiting an abundance of fragrant flowers. Because this species of dogwood also exhibits a range of minor differences in morphology due largely to geographic distribution, it has been divided into a number of subspecies. It has been described as an excellent ornamental tree species.

A note from PlantMom

Hong kong dogwood has strong disease resistance and is generally unlikely to develop illnesses. Regarding care, this plant is fairly low-maintenance. Planted outdoors, it needs only light watering, and larger specimens typically do not require pruning. Smaller plants, however, should be pruned after they have finished blooming. Hong kong dogwood is appropriate for anyone who has an outdoor area, such as a garden or deck, and it does not demand extensive care experience.

— PlantMom
CARE GUIDE

How to keep Cornus Hongkongensis.

Light

Hong Kong dogwood performs best with plenty of sunlight, which promotes healthy growth and energy production. It can, however, tolerate a partly sunny location and does not suffer in such conditions. This dependence on abundant sunlight reflects its natural habitat. Too little or too much sun can affect its growth and development.

Water

Hong Kong dogwood thrives in humid subtropical regions and requires consistently moist conditions. It prefers balanced moisture levels but demonstrates moderate drought tolerance once it is established. Water the plant every 2 to 3 weeks, allowing the soil to dry out slightly between waterings. Typically grown outdoors, Hong Kong dogwood benefits from mulching, which helps retain soil moisture during its active growing season.

Temperature

Hong kong dogwood is a species adapted to temperatures between 41 and 89.6 °F (5 and 32 ℃) in its native growing regions. In hotter seasons, it may need extra water or shade to cope with the heat.

Fertilizer

Timing is critical when fertilizing Hong kong dogwood. Fertilize in early spring and continue monthly until early summer. Fertilizer encourages lovely blooms and supplies energy during both dormant and active growth phases.

Pruning

Hong Kong dogwood benefits from pruning between early and late winter. This process involves removing dead branches, thinning crowded areas to improve air circulation, and shaping the plant to encourage growth. By pruning, you reduce stress on the plant and promote better flowering in the future. Always make clean cuts at growth nodes to minimize damage and prevent disease.

CHARACTERISTICS

Botanical profile.

Plant Type
Tree, Shrub
Life Cycle
Perennial
Genus
Cornus
Family
Cornaceae
Hardiness Zone
4-8
Mature Height
14.94 m
Mature Spread
3.05 m
Leaf Color
Green
Leaf Type
Evergreen
Flower Color
White, Cream
Flower Size
0.10 cm to 0.13 cm
Bloom Time
Late spring, Early summer
Planting Time
Spring, Winter
Harvest Time
Late summer, Early fall, Mid fall
ALSO KNOWN AS

Other names.

en Hong Kong dogwood en Himalayan strawberry tree
FREQUENTLY ASKED

Reader questions.

How should I water my Hong Kong dogwood tree?

Your Hong Kong dogwood is not particular about how you water it. You can use any common watering tool, such as watering cans, hoses, or cups, to moisten the soil. Regardless of the tool you choose, make sure to water the soil directly. This will ensure that all parts of the root system receive the necessary water. Using filtered water is recommended to avoid harmful particles found in tap water. Additionally, using water at or slightly above room temperature is beneficial as extreme temperatures can shock the plant. However, the Hong Kong dogwood typically responds well to any water you give it.

Why should I put fertilizer on my Hong Kong dogwood?

To help your Hong Kong dogwood thrive, it's important to fertilize it for several reasons. Firstly, fertilizing will promote beautiful blooms. Fertilizing in early spring is particularly effective for ensuring excellent flowers during that season. Additionally, fertilizer provides the dogwood with energy that it can store in the ground during dormant growth phases. By giving your Hong Kong dogwood extra nutrients during fall planting or late spring, you can help it retain more energy to use when growth becomes active again.

How many hours of sunlight does Hong Kong dogwood need each day to grow healthy?

To ensure healthy growth, it is important to provide Hong Kong dogwood with a minimum of 3-6 hours of sunlight per day. While this is the minimum requirement, it is worth noting that plants that can tolerate partial sunlight can also flourish in full sunlight. These plants are more adaptable as they require less light for photosynthesis compared to those that need full sunlight or partial shade.

What temperature is best for Hong Kong dogwood?

The optimal temperature for Hong Kong dogwood to thrive is between 65 to 80℉ (18 to 27℃). During the primary growing phase, it can tolerate a maximum temperature of 95℉ (35℃) and a minimum temperature of 15℉ (-10℃). This species can withstand freezing winters and is tolerant of low temperatures. The recommended temperature ranges are as follows: perfect range is 65 to 80℉ (18 to 27℃), highest range is 85 to 95℉ (30 to 35℃), and lowest range is -5 to 15℉ (-20 to -10℃) or below.

What should I do if I give my Hong Kong dogwood too much or too little water?

It's important to water outdoor plants regularly, especially newly planted ones or seedlings. Make sure to water them enough for the first few months while they are still small. Once the roots are established, Hong Kong dogwood plants can rely on rain for most of their water needs. When Hong Kong dogwood plants are in pots, overwatering can be a common issue. If you accidentally overwater your plant, take immediate action to minimize the damage. Stop watering the plant right away. Then, remove the plant from its pot and check its roots for any signs of root rot. If the roots are healthy, you can return the plant to its pot. However, if you find any signs of root rot, trim away the affected roots and consider using a fungicide to prevent further damage. Finally, replant the Hong Kong dogwood in well-draining soil. If you notice that your Hong Kong dogwood is underwatered, simply water it more frequently. Underwatering is usually easy to fix. If the plant's leaves are drooping, drying out, or falling off, it's a sign that it needs more water. Correct your watering frequency as soon as you notice signs of underwatering, and the leaves should quickly return to normal.

When should I fertilize my Hong Kong dogwood?

Timing is crucial when it comes to fertilizing Hong Kong dogwood. Using fertilizer too early, while the plant is still dormant, is ineffective as it will be washed away by rainwater, resulting in waste and pollution. The first application of fertilizer should be in early spring, followed by monthly fertilization until early summer.

What kind of sunlight does the Hong Kong dogwood tree require?

Hong Kong dogwood thrives when exposed to either full or partial sun. For optimal performance, it does best with direct morning light. However, during the summer months, it is important to shield the plant from the intense afternoon sun to prevent leaf burn and maintain the plant's overall appearance and health in temperate environments.

Do I need to change the temperature for Hong Kong dogwood as it grows?

According to research, Hong Kong dogwood tends to experience stunted growth when exposed to long periods of higher temperatures, particularly during the formation of side buds and the growth of main shoots. To promote healthy growth after germination or transplanting, it is advisable to maintain consistent and cooler temperatures, around 65℉(18℃).

How frequently should I give water to my Hong Kong dogwood?

Most outdoor plants can rely on rainfall for water. However, if you live in an area with limited rainfall, you should water your plants adequately every 2 weeks during the spring and fall. In the summer, you will need to water them more frequently. In the winter, when plants grow slower and require less water, water sparingly or not at all. If you have a young or newly planted Hong Kong dogwood, water it more often to help it establish and grow into a drought-tolerant plant. For potted plants, there are two ways to determine how often to water your Hong Kong dogwood. The first option is to follow a set watering schedule, either once a week or every other week. However, this may not be suitable for your specific growing environment. Another approach is to rely on soil moisture. Wait until the top two to four inches of soil have dried out completely before watering again, which is about one-third to half the depth of the pots. Adjust the frequency based on the season, as the plant's water needs will be highest in the summer.

When is the best time to not give fertilizer to my Hong Kong dogwood?

To ensure optimal blooming, avoid using fertilizer with high nitrogen levels on Hong Kong dogwood. Instead, look for fertilizers that have a lower nitrogen content compared to other nutrients. It's important not to fertilize the tree after early autumn to prevent excessive growth right before winter. Additionally, do not fertilize during hot and dry periods, as dry soil doesn't effectively deliver fertilizer and can stimulate growth that requires more water than may be available. It is best to apply fertilizer earlier in the season when temperatures are cooler. Lastly, be mindful that Hong Kong dogwood can absorb fertilizer from nearby plants or lawns, so avoid accidentally giving the tree a double-dose of fertilizer.

Can the sun harm Hong Kong dogwood? How can Hong Kong dogwood be protected from the sun and heat damage?

To prevent Hong Kong dogwood from getting damaged by direct sunlight when transitioning from indoors to outdoors, it's best to gradually move the pots from a shaded area to a brighter spot. However, it's important to remember that even plants acclimated to the summer sun can be harmed by extreme heat. During a heatwave, it is crucial to keep the soil consistently moist to help the plants withstand high temperatures. To protect sensitive Hong Kong dogwood during extreme weather events, consider moving potted plants to areas with afternoon shade or using a shade cloth to provide them with extra protection.

How do I make sure my Hong Kong dogwood stays warm during cold seasons?

Hong Kong dogwood is capable of withstanding freezing temperatures when planted in the ground in areas that do not drop below 15℉ (-10℃) during winter. However, if they are planted in pots or containers, the roots need to be safeguarded from the cold weather. This can be done by covering the container with a blanket or bringing it indoors for complete protection from the elements.

PLATES
Cornus hongkongensis leaf
PLATE 01 · leaf
Cornus hongkongensis leaf
PLATE 02 · leaf
Cornus hongkongensis flower
PLATE 03 · flower
Cornus hongkongensis flower
PLATE 04 · flower
Cornus hongkongensis fruit
PLATE 05 · fruit
Cornus hongkongensis bark
PLATE 06 · bark
ALSO IN THE LIBRARY

You might also like.