A detailed guide to Hoya cultivation methods and daily care techniques

Hoya is not only suitable for indoor display as a potted ornamental plant, it also has certain medicinal value. The flowers of Hoya can be used as medicine, and the stems and leaves have effects such as relieving pain and stopping bleeding, so its economic value is still quite high. Many orchid enthusiasts choose to cultivate Hoya, so how should Hoya be cultivated and cared for?

Hoya

For potted Chloranthus, it is best to use a growing medium mixed from 2 parts leaf mold, 2 parts rice husk ash, and 6 parts yellow clay, blended with 20% river sand to facilitate aeration and drainage. It dislikes direct sunlight, so in summer it should be kept under a shade canopy or in dappled light under trees. It likes moisture and is not drought-tolerant; if the potting soil becomes too dry, the leaves will droop; if this lasts for many days, the leaves will wither, turn yellow, and fall, affecting growth and flowering. However, if the potting soil is often too wet, or if water accumulates after rain, it can also lead to poor root growth and rotten leaves.

To make Chloranthus bloom more and produce a stronger floral fragrance, in addition to paying attention to temperature, light, soil, and water, fertilization must also be done properly. Because Chloranthus blooms many times and has a long flowering period, its fertilizer requirements are also relatively high. Generally, before flowering, a fertilizer combining nitrogen and phosphorus should be applied 1-2 times, and an appropriate amount of superphosphate can also be added to the fertilizer solution. After application, not only will there be more flower buds, but the flowers produced will also be more fragrant. When the first flush of flowers fades, the same fertilizer should be applied again; applying it about once every 15 days can encourage a second round of flowering and fragrance. In addition, from the seedling stage onward, Chloranthus should be pinched back frequently to encourage more branching and more flowers.

Hoya introduction, Hoya care methods

Flower Bonsai Network introduction: Today the Flower Bonsai Network editors share with you an article on Hoya introduction, Hoya care methods，Let's take a look together.

Hoya

Leisure time

In the broad sense, "Hoya" Hoya spp. refers to all plants in the genus Hoya Hoya of the family Asclepiadaceae Asclepiadaceae, while in the narrow sense, "Hoya" refers to one species among them with the scientific name Hoya carnosa. Hoya Hoya spp. has about 200 to 300 varieties, and the flowers of many varieties are fragrant and often exude crystal-clear nectar; most of them are perennial epiphytic or terrestrial herbaceous or woody vines, and a small number are evergreen climbing shrubs.
Hoya is quite widely distributed, being found from the cloud forests of the cold Himalayan foothills, to the tropical rainforests of Asia and South America, and even the arid desert regions of Australia. Hoya from different places of origin have different requirements for the growing environment; for example, those from mountainous areas need a cool climate (they fear heat), those from tropical rainforests need warmth and humidity (they fear cold), and those from desert regions need plenty of sunlight, and so on. Before purchasing, it is best to first check whether the intended planting location is suitable for that variety's growth. In addition, they do not like frequent environmental changes. If they grow steadily and can bloom, it proves that the location is suitable for planting, and the pot should not be casually moved or turned. Furthermore, Hoya roots are sensitive, so it is best to replace only the top one-third of the soil in the pot every three years, and the best time to change the soil is in the warming spring, before flower buds develop.

Different varieties of Hoya differ considerably in appearance, especially in leaf form; there are both large and small ones, including ovate, heart-shaped, square, triangular, club-shaped, and so on. Some are fleshy, some leathery, some have curled leaves, some are smooth, some have markings, and some are covered with fine hairs. What they have in common is that the flowers all have five petals and are borne in umbels; however, some inflorescences have relatively few flowers, for example the narrow-leaved Hoya retusa has only one to three flowers per umbel. Apart from "Bella Hoya" Hoya lanceolata subsp Bella, other Hoya species have repeat-flowering behavior; after blooming, the following year they will grow flowers again at the same position, continuing for several years, so after flowering do not remove the remaining inflorescence (that is, the peduncle), and usually pruning should also be minimized to avoid cutting off flowering points. Hoya seeds have silky seed hairs, and after the follicle fruits mature and split open, the seeds can drift with the wind to other places to grow.

This article aims to introduce the two most common Hoya species in garden stores: "Hoya" Hoya carnosa and "Sweetheart Hoya" Hoya kerrii.
In the narrow sense, "Hoya" refers to the evergreen epiphytic plant with the scientific name Hoya carnosa and the English names Wax Plant or Wax Vine, native to Southeast Asia. The leaves are thick, ovate-cordate to ovate-elliptic, sensitive to light, and should not be exposed to strong sun. The most suitable growing temperature for Hoya is 16 to 21°C. They like brief morning partial sun or bright indirect light, and need sufficient air humidity to flower smoothly, usually blooming in early summer. In the countryside of Hong Kong, China and Taiwan, China, this wild Hoya is occasionally seen growing hanging on tree trunks or rocks.

"Sweetheart Hoya" Hoya kerrii, with the English names Wax Hearts or Sweetheart Hoya, is native to Thailand and Laos, and its heart-shaped leaves make it very popular. The climate of Sweetheart Hoya's native habitat is divided into dry and rainy seasons. During the continuous rainy season, it relies on aerial roots on the stems to actively absorb water and store it in its thick fleshy leaves; in the dry season, when rainy days become sparse, even if the roots lack water for a relatively long time, it can temporarily rely on the supply from the leaves. In autumn and winter, Sweetheart Hoya can accept more sunlight; at other times, like Hoya, it must not be exposed to strong sun. In addition, the leaf cuttings commonly seen on the market, propagated from just a single leaf, can also take root, but using a stem segment with one to two pairs of leaves as the cutting gives a better chance of survival and will also grow faster.

Soil and fertilization

Both Hoya and Sweetheart Hoya are vining in nature, so it is best to provide a support or tree trunk for them to climb, or grow them in hanging baskets. The growing medium (that is, soil) must be well-drained and airy, and must not remain wet for long periods. You can choose osmund fiber (tree fern fiber) mixed with sphagnum moss or a small amount of soil for planting. From late spring to early autumn, apply a slow-release fertilizer once each season, and apply a dilute flowering fertilizer once every half month; stop applying flowering fertilizer after the flowering period ends.

Watering

Although some varieties of Hoya are succulents, with fleshy leaves that can store water, most varieties need to be kept adequately supplied with water regularly. However, almost all varieties like warmth, high air humidity, and a partial-sun to bright semi-shaded environment. Long-term overly wet soil will hinder flowering; instead, misting with water helps its growth more than watering, especially in hot summer, when it can help lower the plant's temperature.
Overall, varieties with hard, thick leaves are more drought-tolerant and can accept more light. For these Hoya, it is best to have a short dry period between waterings, so water thoroughly only after the soil has dried; in winter, on days below 15°C, do not water unless the soil is dry. For other varieties, water when the soil surface becomes slightly dry. Air humidity requirements and water requirements are not the same; the thinner the leaves of a variety, the less sunlight it requires and the higher the humidity it requires. When the weather is dry, you can place a small basin of clean water beside the Hoya to let the water vapor moisten the plant.

Propagation

It is often propagated by cuttings or seeds. Because cutting propagation is relatively fast, it is used more often. Before taking cuttings, the cut surface should be air-dried in advance before cuttings are made, to reduce the chance of wound infection. When taking cuttings, the cutting should be inserted deep enough that the soil just covers the bottom pair of leaf nodes. After cuttings are taken, place them in a spot not reached by direct sunlight and wait quietly for rooting. If the weather is dry, you can cover the pot with a transparent plastic bag to retain moisture, but prick several holes in the bottom of the bag so the plant can breathe. When the leaves become firm, it indicates that roots have formed and normal management can begin.

Notes on Hoya cultivation

Hoya has a very distinctive appearance. It is a climbing plant that often grows attached to tree trunks and rock walls. Hoya can bloom in an environment with only 3-4 hours of sufficient sunlight each day. If light is insufficient, Hoya can only be grown as a potted foliage plant. So what issues need attention during Hoya cultivation?

Hoya

1. Soil:For Hoya cultivation, a humus-rich loam is best, and drainage must be good.

2. Watering:Hoya is a succulent plant, and its leaves contain relatively much water. During the growing season, watering should follow the principle of watering when dry and stopping when wet. Too much watering easily causes root rot, but in summer watering must be sufficient. Because it likes moisture, attention should be paid to frequently spraying water on the leaves to increase air humidity.

3. Sunlight:When grown at home in spring and autumn, Hoya is best placed on a south-facing windowsill or near a south-facing indoor window in a bright spot, which can keep the leaves emerald green and glossy and allow good flowering. But in summer it must be moved to a shaded place to prevent direct strong light, otherwise the leaf color easily turns yellow. If it is kept in a place with insufficient light for a long time, the leaf color will become pale, and the flowers will be few and not vivid.

4. Temperature:Hoya is not cold-tolerant. The suitable growing temperature is 15°C-25°C. In winter, room temperature should be kept above 10°C. If it is below 5°C, it is easily harmed by cold, causing leaf drop and even the death of the whole plant.

5. Fertilization:Hoya fertilization is mainly based on organic fertilizer or compound fertilizer; during the peak growing season, apply dilute cake fertilizer water combining nitrogen and phosphorus 1-2 times per month. At other times, because growth is slow, fertilization should be stopped to avoid wasting fertilizer or causing fertilizer damage.

6. Pruning:Young Hoya plants should be pinched back early to encourage new shoots to sprout, and supports should be set up in time so they can climb upward. After the flowers fade, let them wither and fall naturally; do not cut off the flower stems, because most flower buds the following year will still sprout at the same place. If you do not understand this habit and cut them off, it will affect the number of flowers the next year.

7. Pests and diseases:Hoya is commonly harmed by anthracnose, bad spot disease, and leaf spot disease, which can be controlled by spraying 600 times dilution of 50% carbendazim wettable powder or 400-6w times dilution of 70% mancozeb wettable powder. It is also harmed by scale insects and aphids, which can be killed by spraying 800-100 times dilution of 40% omethoate emulsion or IOC times dilution of 80% dichlorvos emulsion.

Hoya has a rather unusual flower shape and great ornamental value. Using it to decorate the home also makes it easy to create a fresh and natural sense of comfort. The editors have compiled the Hoya cultivation methods here for everyone. I believe everyone now has a certain understanding of Hoya care and can grow Hoya pots with relatively good results.