Alocasia care and facts

Scientific division

Alocasia belongs to the Araceae family, the cold-loving plants. The genus consists of over 70 known species and a large number of hybrids and improved varieties developed for indoor cultivation. Some of the most popular species are Alocasia amazonica (often called Alocasia Polly), Alocasia zebrina with its zebra-striped stems, the magnificent Alocasia macrorrhizos which can develop leaves over a meter long, and the elegant Alocasia micholitziana .

Origin

In the wild, Alocasia is found in tropical parts of Asia and Oceania. It grows in rainforests at ground level under the shady crowns of trees where it receives filtered light, even heat and high humidity all year round. This native environment explains why Alocasia can be somewhat demanding in the home. It thrives best when we mimic the rainforest climate as best we can, with light without strong sun, even moisture and high humidity.

Alocasia at home

Alocasia is one of the most decorative green plants you can have. The large, sculptural leaves give a tropical feel and act as living works of art. In modern homes, it quickly becomes an eye-catcher that creates depth and dynamics in the interior. It is also a plant for those who like to develop as a plant owner, as it is not the easiest to care for but rewards patience and care with fantastic growth.

Location and light

Alocasia needs a lot of light but not direct sunlight, which can burn the leaves. It is best to place it in an east or west-facing window, or a little further into the room near a south-facing window. During the winter, when light in the North is limited, Alocasia does well with additional lighting from plant lamps. If the plant is kept too dark, the leaves will become smaller, the color will be paler and growth will be slower.

Temperature

Alocasia prefers a warm environment, preferably between 18 and 25 degrees. It cannot tolerate cold or drafts and should not be placed near open windows, front doors or radiators. If the temperature drops below 15 degrees, it often goes into dormancy and may lose several leaves. This is a natural process and not dangerous, but it is important to be aware of it so that you do not overwater during this period.

Humidity

Alocasia requires high humidity, preferably between 60 and 80 percent. At home, this can be a challenge, but there are several ways to solve it. You can use a humidifier in the room or place the plant on a dish with Leca beads and water, where evaporation increases the local humidity. Spraying the leaves is also good, but should be done in moderation so that there is no standing water on the leaf surface. Another option is to group several plants close together so that together they create a more humid microclimate. If the humidity is too low, the leaves often turn brown at the edges.

Watering

Alocasia likes evenly moist soil but cannot stand standing with its roots in water. Let the top inch of soil dry out before watering again. In winter, when the plant can go dormant, less water is needed. A good tip is to use room temperature water and avoid cold tap water directly. Many growers prefer to water from below by filling the outer pot or dish with water for a short while, so that the roots absorb the amount they need.

Fertilization

During the light period from spring to early autumn, Alocasia can be fertilized regularly, about every two weeks, with liquid nutrition adapted for green plants. In winter, when the plant grows more slowly or is dormant, fertilization should be reduced or stopped altogether. Too much nutrition during dormancy can damage the roots and lead to yellowing of the leaves.

Transplantation

Alocasia needs to be repotted about every two years, preferably in the spring when growth begins. It thrives in an airy soil mix that provides good drainage. You can mix your own soil by combining regular potting soil with perlite, orchid soil and coconut fiber. This creates a porous mixture that is similar to the soil it grows in naturally. Always use a pot with drainage holes so that excess water can drain away.

Pest

Alocasia is susceptible to pests such as spider mites, thrips and aphids. These thrive especially well if the air is dry. To prevent infestations, you can shower the plant regularly, maintain a consistent humidity level and make sure the leaves are clean. If you notice small dots, cobweb-like threads or sticky coatings, you should act immediately. Treat with soapy water, shower the plant thoroughly or use biological pesticides. Always isolate infected plants from your other plants until the problem is resolved.

Proliferation

Alocasia is mainly propagated by dividing side tubers, known as corms or bulbs in English. These small tubers develop underground and are attached to the mother plant. When you want to propagate an Alocasia, carefully remove the entire plant from the pot, shake or rinse off the soil and identify the small tubers. Separate them carefully with your hands or a clean knife. The tubers can then be placed in water for a few weeks until they develop roots and a first leaf. When the roots are at least a few centimeters long, the tubers are planted in a small pot with airy soil. It is also possible to put them directly in the soil, but there is a risk that they will rot if the moisture is too high. Patience is required as it sometimes takes several months for the tubers to come to life.