Dendrobium Orchid

Dendrobium likes to be kept moist, so water well and repeat when the top inch or so of the potting soil is dry. Many people recommend using rain water or demineralized water on orchids because they can be sensitive to impurities and minerals in tap or mineral water. Do not water or moisten the leaves because this can lead to infection or rotting. Misting the leaves is suggested however, as this keeps the plant hydrated and prevents root rot.

Dendrobium enjoys bright light, but it should not be exposed to direct sunlight. This one of the more low light orchids where some morning sun and a moderate amount of indirect light is enough. To achieve the best blossoms, the plant should be exposed to a long narrow light source, of about 3-5 hours a day. If the light is too dim, you can set it near an east or west facing window or use a fluorescent light.

Dendrobium orchids should be kept between 65-80 degrees Fahrenheit (18-26 degrees Celsius). It is vital that the temperature fluctuate during the night time hours, dropping by at least 10 degrees. Because of this, it is best to avoid placing these plants close to heating vents or radiators. When displayed in a warm location, make sure to provide good air circulation.

Dendrobiums prefer high humidity, so aim for at least 50-70% if possible. For instance, keep a container of water behind the pot or place the pot on a bed of wet pebbles. Avoid misting its leaves directly as this could increase chances of rotting, but misting the general environment can help.

Dendrobium orchids prefer a light, well-draining potting mix. A good mix consists of a combination of light bark chips, sphagnum moss, and perlite. Make sure to use materials that are free of chemical residues and allow for sufficient aeration. A loose well-aerated mix is necessary for healthy root growth.

Dendrobium orchids typically don't require fertilization during their resting period, but during its growth period, you can fertilize with a balanced fertilizer formulated for orchids. For best results, mix a quarter as much fertilizer to the water and fertilize your orchid every other week. Always use water-soluble fertilizer as too much can burn the roots.

Scale insects, aphids and spider mites can be some of the pests that can attack dendrobium orchids. To control these insects, spray the plants with neem oil. Insecticidal soap can also be used, but is less effective than neem oil. For severe infestations, some people recommend using insecticidal soap with horticultural oil, as this combination can often effectively control most insects. If all other methods fail, try using a systemic insecticide drench.

Dendrobium orchids should be repotted once a year or when the roots become crowded, usually every two to four years. When repotting, use a light, well draining potting mix made up of equal parts of light bark and sphagnum moss. Place the pot on a tray of water so that it can absorb moisture from below.

Prune away any dead stems or stalks, and any yellow or wilted leaves. You can also cut back any long or straggly stems. When pruning, make sure to use clean, sharp scissors to avoid any diseases or infections. Deadhead flower spikes once they have bloomed and faded, as this will also improve the appearance of the plant.

Mulching orchids helps to keep soil temperature even and retain moisture in the potting mix. A good mulch material is an orchid bark chip, which is composed of chopped fir bark pieces. Spread a thin layer of chips around the base of the plant, but make sure not to cover the crown or roots of the plant.

Dendrobiums can be propagated by division or via stem cuttings. When propagating by division, separate the rhizome using a sharp knife and re-pot the divided sections into their own pots. Whenever taking a stem cutting, make sure to cut the stem to just above a node. Leave the cutting to dry for several hours before placing it in a pot of damp sphagnum moss or potting mix.

Dendrobiums are best when allowed to naturally climb up a support stake, as this will give the plant a more natural look. A bamboo stake is recommended as the material is strong but lightweight. Make sure to stake the plant securely and position it so that it gets even light exposure.

Dendrobiums need a period of rest and reduced watering to bloom again. During this time, water only when the soil is completely dry and make sure to keep it in a dark place for a few months. The rest period usually starts in autumn and ends in spring.

Dendrobium orchids are not poisonous, and there aren't any reports of them being toxic to pets or humans.