How to overwinter potted Dendrobium orchids? An analysis of the latest winter care methods

Late autumn has now arrived, and many friends who enjoy growing Dendrobium have noticed that the plants' growth rate is beginning to slow down. In fact, Dendrobium has rather poor cold tolerance, so after autumn arrives, as the weather gradually turns cooler and temperatures gradually drop, the plants also begin to enter a semi-dormant state. And in winter, when temperatures are even lower, they will enter a fully dormant state.

After winter arrives, we will find that Dendrobium in a fully dormant state usually gradually loses all its leaves, and its stems are bare, just like dead branches. Actually, this situation is not the most important thing; the key question is whether it can safely and successfully overwinter when placed outdoors, and this is what most growers are more concerned about.

In fact, as long as the following aspects of care are handled well at this time, potted Dendrobium can usually overwinter safely and successfully. So, which aspects of care do we mainly need to handle well?

1. Adjust the temperature

Temperature protection is the top priority for Dendrobium to overwinter safely, because apart from a very few varieties that have some cold tolerance, most of its varieties are not cold-hardy. Therefore, before winter temperatures plummet, it must be moved promptly to a warm indoor environment for care, to avoid frost damage or freezing to death.

So in winter, potted Dendrobium cannot be placed outdoors in the open to overwinter. Since Dendrobium prefers a warm, semi-shaded growing environment, after bringing it indoors in winter it should be placed in a spot with some scattered light, while ensuring the ambient temperature stays above 5°C.

2. Maintain humidity

Although Dendrobium likes a humid growing environment, watering in winter also needs to be properly controlled, waiting until the growing medium is completely dry before watering. After all, in winter it is basically in a dormant state, using little water, and if the substrate is too wet it can easily cause root rot. Moreover, frequent watering can instead easily reduce its cold resistance, making it more susceptible to freezing.

Although watering frequency must be controlled in winter, Dendrobium does have relatively high requirements for relative air humidity, and in winter the air is often dry and cold, rather dry. This conflicts with its moisture-loving growth habit, so when the air in the environment becomes dry, spray water appropriately to raise the air humidity in the growing environment.

3. Stop fertilizing

Since Dendrobium is basically in a dormant state in winter, it not only consumes little water but also consumes very few nutrients, because it is basically in a state where it will not grow or sprout. Therefore, fertilizing must be stopped promptly in winter; otherwise, even if fertilizer is applied, it cannot be absorbed by the plant, which not only wastes fertilizer but may also cause fertilizer burn.

Fertilizing Dendrobium should be done during its growing season, generally in spring when temperatures warm up; let the dormant Dendrobium undergo vernalization for 5-7 days, then move it to a brighter, well-ventilated spot with more ample light for care. And when it begins to sprout in spring, we can then apply additional fertilizer, but the concentration must be properly controlled, and it must be sufficiently