What to do if the rose leaves turn yellow
Let me share some experience on rose leaf yellowing and detailed remediation methods for yellowing rose leaves in the aspect of green plant maintenance. Please refer to the following introduction for more details.
Rose leaf yellowing is quite "normal," and it is almost a universal phenomenon. Even super experts in rose cultivation may encounter yellowing leaves.
So, what are the reasons for rose leaf yellowing? How should we deal with yellowing leaves?
1. Yellowing leaves caused by diseases and pests
Roses are prone to "getting sick" and have a high chance of being infected with diseases and pests, which spread very quickly. Diseases and pests are divided into diseases and insect pests.
Diseases mainly include powdery mildew and black spot diseases. In the early stage, you can simply prune them. If the infection is excessive, fungicides must be used, and carbendazim is recommended. You can also use mancozeb every half a month for prevention.
Insect pests mainly include aphids, scale insects, and red spiders. Pyrethrin and Bai Chong Ling are recommended for insect control. The prevention of insect pests mainly depends on the environment. In well-ventilated conditions with good air quality, the chances of roses being affected by pests are much lower.
2. Yellowing leaves caused by soil issues
Soil is often an overlooked factor. Roses grow best in loose, breathable, slightly acidic soil. If the potting soil is not breathable or is alkaline, yellowing leaves are inevitable.
The best solution is, of course, to change the soil. When changing the soil, you should also cut off all yellow leaves and dead branches on the plant, and remove any rotting roots.
3. Yellowing leaves caused by watering issues
Too much or too little watering can cause rose leaves to turn yellow. The principle of watering roses is "water when dry, don't water when not dry, and water thoroughly when watering."
Specific watering methods include: watering once a day in summer, preferably in the evening, and ensuring no standing water in the pot after watering, as this indicates poor soil drainage. In winter, water when the potting soil is half dry. Roses prefer moisture and must not dehydrate, especially in summer, as dehydration can easily lead to death.
4. Yellowing leaves caused by too little or too much fertilization
What to do if the rose leaves turn yellow
If roses want to bloom continuously, they naturally need to follow up with nutrients, and fertilizers are essential. If roses are deficient in fertilizer, not only will they bloom less, but the leaves will also turn yellow, and compound fertilizers must be added. However, you must first rule out whether this yellowing is caused by soil, watering, or diseases and pests.
In addition to too little fertilization, too much fertilization can also cause yellowing. How can you tell if a rose has suffered fertilizer damage? Wilted and curled top tender leaves and branches indicate fertilizer damage. Another method is to take a small amount of soil and smell it. If there is a distinct pungent smell, it is definitely fertilizer damage.
The best and most direct method is to change pots, which can be a troublesome task, so it is necessary to control the frequency and amount of fertilization. If there is light fertilizer damage, flush the roots with tap water for a long time until the pungent smell in the soil is gone.
5. Yellowing leaves caused by sudden environmental or temperature changes
Some rose enthusiasts buy two pots of roses from a vendor, and they are fine at first, some even blooming. But after a couple of days at home, they start to show yellow leaves, which is a typical case of yellowing caused by environmental changes. Don't worry too much in this case; just place the plant in a well-ventilated area, and it will gradually adapt after a few days.
In some places, the weather can be very unpredictable with frequent temperature drops or rises of more than ten degrees, which can be hard on even humans, let alone "delicate" rose flowers. The best solution is to place the roses in a location where the temperature does not change much.
The comprehensive knowledge sharing on what to do if rose leaves turn yellow and detailed remediation methods for yellowing rose leaves, I hope it helps you.