Hoya Pubicalyx Care And Growing Tips

Hoya Pubicalyx

Last updated on August 19th, 2022 at 04:27 am

Hoya Pubicalyx is a plant that originates from Asia and has been introduced into the United States as an ornamental horticultural specimen.

This hoya variety produces cream-white flowers with five petals; it can reach heights of 15 feet tall if left to climb and is a vine plant.

It has also been known as waxflower hoya or cheesecloth flower, as it can produce white flowers that resemble those of the carnation and cheesecloth fabric respectively.

Hoya leaves are broad with serrated margins; they have adapted to allow this species of plant to grow in areas where sunlight is scarce due to the high tree canopy.

Hoya Pubicalyx flowers are white in color, and may be striped with dark green or pink hues; they produce a sweet fragrance that some find unpleasant. It is important for this plant to receive proper care so as not to cause damage or illness due to its poisonous nature during ingestion by humans or animals.

Origin and description

Hoya Pubicalyx

Hoya pubicalyx is native to tropical regions in south-east Asia, particularly the Philippines. The plant belongs to the Apocynaceae family and mainly grows as a climber but can also be found as an epiphyte or shrub sometimes. It has glossy leaves that grow opposite along its stem with thin petioles, a leathery texture, and is simple in design.

The leaves grow to be around 15cm long with a width of about 12 cm but can get slightly bigger or smaller depending on the climate it grows in. It has thick stems that produce white star-shaped flowers that are fragrant at night, these appear from spring through to autumn which add variety and beauty to the plant.

Hoya pubicalyx is a creeping vine with thin, green stems and waxy leaves that form along its length in pairs or whorls of three. It will readily attach itself to other plants but it can also grow as an epiphyte on tree trunks and branches if given no support.

Hoya pubicalyx propagation

Hoya Pubicalyx

Hoya pubicalyx will not need any special treatment to grow and can be propagated by seed or cuttings during spring. Seed should be surface sown in a free-draining compost, the temperature of which is around 20-25 degrees Celsius (68-77 Fahrenheit). The seeds germinate at this temperature but it can vary, so watch carefully and remove any seedlings that don’t germinate.

The rooting of cuttings can be carried out at different times during the year but requires a moist airy medium such as 50% peat and 50% pine bark with added perlite or vermiculite to improve drainage. The bottom heat required is around 20 degrees Celsius (68 Fahrenheit) and the cuttings should be misted regularly to avoid them drying out.

Hoya pubicalyx can also propagate through layering during spring or summer once it has reached a good size, this allows you to create another plant without having to buy one from elsewhere.

The pots used for hoya pubicalyx should have a free-draining soil mix, around 50-60% peat moss and 30-40% perlite will suffice. The plant likes to be in high humidity so misting the leaves regularly or standing them on wet Sphagnum moss are good ways of achieving this.

Hoya pubicalyx care

Hoya Pubicalyx

Hoya pubicalyx will not need any special treatment for the colder weather if kept indoors, but make sure you do not expose it to too much cold or draughts. Once nighttime temperatures fall below 16 degrees Celsius (61 Fahrenheit), then this is an indicator that your plant should be moved inside where they are generally more hardy to the cold.

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Hoya pubicalyx is a fairly easy to care for plant and can be grown in just about any type of environment or condition. They need plenty of sunlight but they don’t require an overabundance of water which makes them fairly resilient plants that are perfect for beginners who may not have extensive knowledge on how to properly care for plants.

Light requirements

Hoya pubicalyx does not need much light to grow well but should be placed in a bright location. The minimum requirement is around 500-1500 lux which can easily be achieved near a window or just outside on the patio during the summer months.

The plant will flower best when given high amounts of sunlight, this usually occurs naturally from spring through to autumn when placed outside.

If this is not possible then some artificial grow lights will do the job well and allow your plant to continue growing if kept within the range of them.

Hoya pubicalyx should be grown under artificial light if you cannot provide adequate sunlight for your plant. You can choose to grow it indoors or outdoors, but make sure that they receive at least eight hours of natural sunlight every day if possible.

Soil/potting mix

Hoya pubicalyx does not need much soil to grow well but should be placed in a container with drainage holes. The potting mix can consist of an equal volume of garden loam, peat moss and coarse sand or perlite added.

If you are planting it in the ground, then amend your soil by adding around 40% organic material such as compost or well-rotted manure.

The plant will grow best when the potting mix is kept moist but not waterlogged and should be watered regularly during warmer months. During winter, they can become dormant so watering should only occur every few weeks to once a month depending on your climate.


During the summer months, you will want to make sure the potting mix is kept moist but never soggy. You can achieve this by watering the hoya plant at least twice a week. During the winter months, you will want to reduce your watering to once every couple of weeks or so.

If your hoya is exposed to temperatures below 40 degrees Fahrenheit (or around five Celsius), it’s best not to water them as this could cause damage or even kill the plant.

Hoya pubicalyx is prone to root rot, which can become a serious problem if left untreated. If your leaves begin drooping and the stem of the hoya plant becomes soft, you should stop watering immediately as this means that there is already some sort of damage occurring.

Once this happens it’s best not to water at all until you can get the hoya plant healthy again.


Hoya pubicalyx should be fertilized at least once a month. You can do this by mixing in one teaspoon of any standard liquid fertilizer into the water you use to water your hoya plant with or misting it directly onto the leaves and stems of the plant.

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The best time to add fertilizer is during warmer months when growth will be faster. During the winter months, you can reduce the amount of fertilizer to once every two weeks or so as this is when the hoya plant will be going into a more dormant state where growth slows down significantly.

You should never fertilize your hoya plant with any type of solid fertilizer as this might burn and damage the roots which could result in the death of your plant.


Hoya pubicalyx is most likely to thrive when the temperature is between 65-95 degrees Fahrenheit (or around 18 Celsius). If you are growing your hoya plant indoors, then it’s best to keep them in an area that receives plenty of natural sunlight.

If they are exposed to temperatures below 40 degrees Fahrenheit (or five Celsius), this could put them in a state of shock and even kill the plant.


Hoya pubicalyx can handle a wide range of humidity levels, but it’s best to keep them in an area that has at least 40% humidity. If you live in an arid environment and struggle with low levels of humidity, then using a room humidifier or placing the hoya plant on a tray filled with pebbles and water can be very beneficial.


Hoya pubicalyx will grow new leaves at the stem’s joint, so you can prune off any dead or dying stems to keep your hoya plant looking tidy. If your hoya becomes leggy over time, you can simply trim it back and encourage newer growth.

If there are any yellowing leaves on your hoya plant, you should remove them immediately. This will help the rest of the leaves stay healthy and vibrant.

When to repot

You should repot your hoya plant every couple of years or so. When you first bring a new hoya home, it’s best to wait until the roots have become overgrown with the potting mix before attempting to move them into something bigger. This usually takes between six months and one year depending on how fast they are growing.

If you have a hoya plant that has been in the same pot for three or more years, it’s best to repot them at least six months before your first frost. This will allow them adequate time to adjust to their new environment and ensure they don’t suffer any transplant shock during colder weather.

If you have multiple hoya plants of different sizes, it’s best to repot them one at a time so they don’t get stressed out by the process or start competing for resources.

If you live in an area where your hoya plant is exposed to temperatures below 40 degrees Fahrenheit (or around 5 degrees Celsius), then it’s best not to transplant your hoya during this period as it could damage the roots and cause the plant to die.

You should always use a pot that is around one size bigger than your hoya’s current container as this will be much more comfortable for them. You shouldn’t go any smaller though as it could restrict their growth and potentially damage their roots if they’re too tightly packed in there.


Hoya pubicalyx will enter a dormant state during the winter months where they won’t be growing much at all. If you have any new growth on your hoya plant, then it’s best to cut them off as this can prevent further flowering that year or even kill the entire plant if there are too many.

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It is possible for your hoya plant to flower twice in one year, but you should never remove all the flowers before they have a chance to fully develop. This will prevent your plant from putting too much energy into growing new blooms and could cause them stress or even kill them if it’s done repeatedly over time.

You can tell that your hoya is entering the dormant phase when the leaves start to look droopy and dry. If this happens, then it’s best not to water them until they become plump again which will ensure you don’t drown their roots during dormancy.

Flowers & Fragrance

Hoya Pubicalyx

Hoya pubicalyx plants are known for their beautiful and fragrant flowers. Most of them will bloom in the summer months where they can live for up to three weeks before dying off completely.

If your hoya plant has just flowered, then you should never cut all the blooms as this could prevent it from flowering again that year. Instead, you can cut off the flower stalk a couple of inches below where it attaches to the main stem. This will allow energy to continue flowing down into the roots instead of being wasted on producing blooms that may not come out again for months or even years.

If your hoya plant has been flowering all summer and is just about ready to go into dormancy, then you should not cut off any of the blooms. You can also allow them to fully wilt and drop before removing them if this is more convenient for your lifestyle or preferences.

Growth rate

If you have multiple hoya plants of different sizes, it’s best to repot them one at a time so they don’t get stressed out by the process or start competing for resources.

Is Hoya Pubicalyx toxic?

Hoya Pubicalyx can be mildly toxic to pets if ingested. It is not particularly harmful in small quantities but it should still be kept out of reach from cats, dogs, and young children who might want to chew on them or swallow pieces.

If your hoya plant gets eaten by a pet you will notice vomiting, diarrhea, and possibly convulsions. If this happens, call your veterinarian immediately and take the plant with you to show them what was eaten so that they can properly treat the animal.

Hoya pubicalyx does not contain any chemicals that are harmful to humans or other animals but should still be handled carefully because of its sharp leaves and stems. It is important to wear gloves around the plant to avoid any cuts or scrapes.

USDA Hardiness Zones

Hoya pubicalyx is a tropical plant and cannot tolerate freezing temperatures. It can be grown indoors as long as it does not freeze, or outdoors in USDA Hardiness Zones 11-12 where the temperature rarely drops below 40°F (the minimum temperature that hoya will withstand).

In zones with colder winter weather, the plants should be brought indoors to a warm room for the winter.

Pests and diseases

Hoya plants are relatively pest-free, especially when grown indoors where most pests that affect hoyas can’t survive. If you do find any problems with your plant, the treatment is usually easy and effective since there aren’t many types of insects or diseases that bother the plant.

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The two main insect problems are mealybugs and scale. Mealybug treatment is easy: simply dab the insects with alcohol or other strong cleaners like rubbing alcohol (isopropyl) to kill them. Scale can usually be controlled by an application of a systemic insecticide, which will protect your plant for several months after it’s applied.

The main fungal diseases of hoyas are root rot and leaf spot. Root rot is caused by over-watering or poor drainage, whereas leaf spot looks like a series of brown spots on the leaves that eventually catch other diseases and cause your plant to die. Prevention for both fungal infections is better than treatment: make sure you’re not overwatering your plant and make sure the soil drains well.

What is the difference between Hoya Carnosa and Pubicalyx?

Hoya Carnosa and Hoya Pubicalyx are two different types of plants. Most people will think that they look very similar, but there is a huge difference between the two plants.

Hoya Carnosa is also known as the waxflower hoya. This type of hoya has thick, waxy leaves that are green in color and small white flowers with red centers. Hoya pubicalyx does not have this same kind of leaf structure but instead has dark green oval-shaped foliage which becomes reddish in the sun. Hoya pubicalyx also has small white flowers with red centers and thin waxy leaves. Both types of hoyas produce

Hoya Carnosa:  -Leaves have pointed edges -leaves grow in rosettes at nodes on woody stems

Hoya pubicalyx:  -Leaves have rounded edges -leaves grow in clusters at nodes on fleshy stems.

How do you get more splash on Hoya Pubicalyx?

There are two ways to go about it. First, you can leave the hoya in a hot room for most of the day with plenty of sunlight or UVB lighting. Also, you can spray the hoya with a mild soap solution to simulate rainfall.

Hoya Pubicalyx does not have a growth habit, so it’s important to keep this in mind when adding any extra splash. It is very tolerant of being overfed and likes bright light with good drainage. Keep your hoya moist but do not allow the potting mix to become soggy or dry out completely between watering.

If you are watering with tap water, let the water sit for at least 24 hours before using it. This helps to prevent any added chemicals like chlorine, fluoride, or copper from hurting your hoya plants as these can be very harmful and kill them quickly.


If you follow these steps and care for your hoya plant the way it prefers, there is no reason why you should not see a nice splash of flowers. Just make sure to give them plenty of light with good drainage and don’t allow the soil to get too dry between waterings.