Reasons for Yellowing, Dry Geranium Leaves and How to Remedy Them
It is well known that geraniums are loved by flower enthusiasts for their abundant blooms and pleasant fragrance. They are perennial herbaceous plants originating from South Africa, and South Africa has an annual average rainfall of 464 mm, lower than the world average of 857 mm. Therefore, what they fear most is the plum rain season in the south, as this kind of stuffy and humid weather most easily causes geraniums to develop yellow leaves. So, after yellow leaves appear, how should they be remedied?
First, the yellow leaf phenomenon in geraniums is mostly caused by daily lack of water, and this is also the simplest situation. Yellow leaves caused only by lack of water are generally relatively easy to identify. Usually, leaves will drop below the position of water shortage, and the main manifestation of yellow leaves is curled and dried leaves. The next typical feature is that when you pull the leaves with your hand, the stems are still very tightly connected. This situation is relatively simple to handle. You only need to first trim off all the yellow leaves with scissors to prevent some unnecessary infection, then possibly water it thoroughly all at once, and after a few days of recovery there will basically be no problem.
Then, another type of yellow leaf situation is yellow leaves caused by excessive watering. This kind of yellow leaf has a characteristic: the leaves generally do not curl, and there will be some rotten black spots on the leaves. With a gentle touch of the hand, the leaves fall off by themselves. Usually, this situation can be judged as yellow leaves and root suffocation caused by excessive watering. For yellow leaves caused by this reason, the handling method should also be a bit more cautious. Likewise, trim off all the yellow leaves, then carry out carbendazim sterilization. You can sprinkle carbendazim into water, then use it for a drenching irrigation sterilization to prevent some black rot from occurring.
Finally, one type of yellow leaf situation is relatively serious. Usually, by the time it is discovered, yellow leaves have already appeared in every direction on every stem of the whole plant. At this time, handling must be even more cautious. First check whether there is any sign of bad soil at the junction between the roots and the soil. If the soil is fine, then you can select some uninfected branches from the roots for cuttings as a backup. If some stems previously developed black rot, then you can try to rescue it by cutting off roughly the entire branch, then use a cotton swab dipped in carbendazim powder to disinfect and sterilize all its wounds. At the same time, repeat the method just mentioned and use carbendazim to irrigate the roots once more. In this way, your seedling may still be saved.