In the blue demon's love circle, there are flower friends asked about the problem of rhododendron yellow leaves, in recent days, blue demons also often receive private messages, consulting the problem of rhododendrons, want to come, now is indeed the high incidence of rhododendron yellow leaves, then today the blue demon for this problem, specifically to analyze the causes, and ways to deal with it.
The cause of the yellow leaves after the rhododendron flowers
Rhododendron blossoms are beautiful, people can't help but raise two pots, but for novices, the problem of rhododendron yellow leaves until they wither, it seems to be an inevitable ending, why this is so, the main reasons are the following 6 points.
1. Improper operation of changing pots
After the rhododendron appears yellow leaves, gradually wither, most of which occur on the newly purchased rhododendron potted plants, because the newly bought rhododendron, due to the wrong pot change operation, it is easy to lead to new roots do not occur, new roots do not grow, flowering consumption is large, and it is easy to wither after flowering.
Rhododendron root system is the kind of fine whisker roots, and like the acidic soil environment, we bought back the rhododendron, in the pot change, must first deal with the root system, and then potted, if directly with a complete original soil mass transplanting, then it is not easy to grow new roots, a long time, rhododendron is trapped.
Correct method of changing pots:
Beat off 1/3 of the soil outside the rhododendron proto-soil mass, or cut it directly, and then plant it in pots and water it thoroughly. Because the root system is damaged, it will stimulate the cuckoo to produce new roots, grow into the surrounding new soil, and the roots will naturally not be easy to wither.
If you say that the newly acquired cuckoo did not do anything wrong when changing the pot, but there are still yellow leaves, half dead and not alive, the main problem is still in our maintenance methods. , you have to check from the following 5 aspects.
2. Too much watering
Watering has always been a pit that we novice flower lovers can't get around, most of the potted plants are because of too much watering, suffocating roots and die, and the same is true for rhododendrons. Rhododendrons are flowers that like to be wet but are not tolerant to water, so be sure to pay attention to seeing dry and wet when watering.
Especially the use of ceramic pots to plant rhododendron flower friends, more need to pay attention to observe the dry and wet changes of the pot soil, the ventilation of the ceramic pot is not good, watering more is easy to stuffy roots, causing the azalea wilting, it is recommended that before each watering, first open the 2-3cm deep soil to see, dry and then water, if it is more humid, wait a little longer.
3. Thick fertilizer was applied
In addition to watering, fertilization is also easy to cause rhododendron roots, especially water-soluble fast-acting fertilizers, which often cause burning seedlings due to excessive concentrations. Fertilizer damage will not only cause the leaves of the rhododendron to turn yellow and scorched, but more importantly, it will damage the root system of the rhododendron, and the serious fertilizer damage will cause the rhododendron to stagnate from then on.
4. Leaf blight
Rhododendron is more likely to get leaf blight, especially in the absence of fertilizer or bad root system, it is more likely to appear leaf blight, manifested in the leaf tip black scorched, gradually spread to the entire leaf, resulting in leaf shedding, plant slowly withered.
If our rhododendrons, no stuffy roots, fertilizer, when changing pots, also deal with the root system, or there is a slow leaf tip black phenomenon, the blue demon recommends that you spray Dysen manganese zinc in time, because it is very likely to be infected with leaf blight.
Of course, it is better for us to regularly take bactericidal drugs to prevent it, and when spraying other flowers, we should also spray the cuckoo by the way.
5. Iron deficiency
Rhododendron flowers like acidic soil environment, if the soil is alkaline, rhododendron is prone to iron deficiency, resulting in new leaves yellowing, serious will appear leaf scorching, leaf fall.
For the problem of rhododendron yellowing, it should be mainly prevention, every time watering, add a little ferrous sulfate, or vinegar, adjust the water to acidity, so that the potting soil is not easy to alkalinize, rhododendron is not easy to appear iron deficiency yellowing disease.
If the rhododendron has appeared iron deficiency, in addition to timely irrigation of ferrous sulfate, it is best to cooperate with foliar spray of water chelated iron, supplement iron fertilizer, and correct yellow leaves faster.
6. Exposure to sunlight
Cuckoos like the sun, but not tolerant of exposure, like now in mid-to-late May, it is time to give cuckoo shade, exposure to the sun will also cause the leaves of the cuckoo to be sunburned, sun spots, and there will also be black and scorched leaf tips.
In summer, you can put the rhododendron on the north balcony for maintenance, or put it in the shade, or in the astigmatism, and do not expose it to the sun.
Rhododendron is actually not difficult to raise, pay attention to the above 6 points, your rhododendron blooms every year will not be bad.
This article is the original sharing of the Blue Demon Garden. In my public name: Blue Demon Garden (ilanyao), a collection of thousands of flower raising experience articles are collected to help you less flower pits!