Is abnormal leaf drop in the Radermachera sinica due to a lack of fertilizer? Master the disease prevention methods

Radermachera sinica is a plant very well suited to indoor foliage display; it can be grown as a small potted plant or as a medium to large potted specimen. Moreover, many people who grow Radermachera sinica in pots at home do not only find its ornamental value and air-purifying function strong, but more importantly, it carries the beautiful meaning of “enduring happiness”.

However, if you want to grow household potted green plants well, you cannot do it without mastering certain care and management skills. The same is true for growing Radermachera sinica; we likewise need to understand this plant's growth habits in advance and then manage and care for it according to those habit characteristics, otherwise we may encounter poor growth that lowers its value.

Abnormal leaf drop in Radermachera sinica is often one of the adverse growth phenomena that people more easily encounter. So what is going on when Radermachera sinica shows abnormal leaf drop? Is there any way to effectively solve this problem?

Under normal circumstances, as long as the growing environment is suitable, Radermachera sinica can remain evergreen all year round. Even if a small number of old leaves occasionally fall off, this is usually normal. After all, during growth the plant continuously carries out metabolism and the replacement of old and new growth.

But if a large amount of leaf drop occurs, especially when young leaves also drop in large numbers, or when the leaves fall over a large area with just a light touch or a puff of wind, this indicates an abnormal leaf drop situation. Abnormal leaf drop in Radermachera sinica may be a sign of fertilizer deficiency. At this time, we can supplement it with some nitrogen fertilizer and potassium fertilizer.

The fertilizing method is also fairly simple: fully dissolve a highly water-soluble nitrogen-potassium fertilizer in water and stir it evenly, then pour it into the flower pot of the Radermachera sinica. In this way, a good amount of nutrients will be added to the potting soil, and after these nutrients are smoothly absorbed by the plant's root system, they will be supplied to the whole plant. This can not only reduce or prevent leaf drop, but also promote the plant's growth, giving the potted plant a scene of luxuriant branches and leaves with crisp, glossy green foliage.

But the editor suggests supplementing a little iron for Radermachera sinica during topdressing; the original author usually uses ferrous sulfate to promote leaf growth and also make the leaf color even more emerald green. Together with the intake of nitrogen and potassium elements, applying iron as well in combination can not only avoid fertilizer-deficiency leaf drop in Radermachera sinica, but also promote the growth of branches and leaves.

The specific method is: first take two small spoonfuls of ferrous sulfate powder, weighing about 2 grams, and put it into an appropriate amount of clean water; then take one small spoonful of nitrogen fertilizer and one small spoonful of potassium fertilizer, and add them both to the clean water in which the ferrous sulfate has been dissolved. Finally, stir the mixed solution evenly so the powdered fertilizer dissolves fully.

Before use, dilute the mixed fertilizer liquid in an appropriate ratio, then directly pour the diluted, evenly stirred fertilizer water onto the Radermachera sinica. It is believed that before long, the abnormal leaf drop in Radermachera sinica will gradually disappear, and the plant will also grow with luxuriant branches and leaves and verdant foliage.