Analysis of the Reasons for the Stunted Growth of Rose of Sharon
This article brings you knowledge about roses, specifically the analysis of the reasons for the stunted growth of Rose of Sharon. Let's learn about it together.
Plant Stunted Growth: Refers to the phenomenon where the growth of the plant's vegetative organs, such as roots, stems, and leaves, stops. It is common for Rose of Sharon seedlings to experience stunted growth after transplanting. Now that it is summer and hot, originally, this topic was suitable for spring, but as I have some free time, I would like to share my views and opinions. Welcome to correct me!
1. Early Spring and Winter Transplanting of Rose of Sharon Seedlings: At this time, the temperature in most areas is low, usually below 5°C during the day. The Rose of Sharon is in a dormant period and in a state of growth stagnation, which is a normal physiological phenomenon, known as "pseudo-stunted growth." Additionally, during the high-temperature period of summer, when the daily temperature is above 33°C and the air humidity is low, the Rose of Sharon is semi-dormant and almost does not grow. The respiratory function is greater than the photosynthetic function. Of course, this season is not suitable for transplanting flower seedlings unless the temperature and humidity are artificially controlled, otherwise, it is easy for the seedlings to fail to adapt and the plants will die.
2. Stunted Growth under Normal Climatic Conditions:
2.1 Surface Stunted Growth. The root system of young seedlings is weak, and they must re-develop their root system after transplanting to absorb more nutrients for the growth and development of the plant. Therefore, no growth or development of the stems and leaves can be seen on the surface. This situation is often seen in the transplanting process of toothpick seedlings and needle-like seedlings. You must be patient and wait, and it may take three months to improve, depending on the vitality of different varieties. This process is the root system's recovery and development, sometimes referred to as "pseudo-stunted growth."
2.2 Soil Difference Stunted Growth. The potting soil used for container gardening is too different from the original soil of the small seedlings, causing stunted growth. The soil used in nutrient pots is usually loose and breathable, with slow-release granular fertilizer placed in it, while the soil used by gardening enthusiasts varies widely and is difficult to blend with the original soil. This often leads to the phenomenon of original soil surrounding the roots, where the roots do not grow into the transplanted soil but are confined to the original soil, with almost no growth, showing no development of stems and leaves after transplanting. Attention should be paid to the physical properties of the potting soil, trying to keep it close to the original soil quality of the seller, and when transplanting, carefully remove the top layer of the original soil (without damaging the roots), exposing some roots to allow them to fully contact with the new soil and provide a new environment for root growth outward.
2.3 Bare-root Seedling Stunted Growth. Many bare-root seedlings sold by merchants are wrapped in mud or garden soil, and the protective soil around the roots is compacted to keep the roots moist and protected during packaging. If transplanted as is, the roots often have their growth obstructed, and the seedlings may wither and die. In this case, wash the roots or break the soil clumps, trim the old roots appropriately, and then transplant them into new soil and new pots.
2.4 False Active Stunted Growth After Missing the Transplanting Season. This usually happens after spring, when the seedlings have already sprouted when they arrive by express delivery, but the roots have not yet recovered. In suitable temperature and humidity conditions, the buds grow rapidly, using up the plant's moisture and nutrients, and then the growth stops and the plant becomes wilted. If the plant does not receive timely water supplementation, it will quickly wither and die. Therefore, it is important to master the timing of transplanting and avoid buying seedlings and transplanting them during non-transplanting seasons. If you find that the buds have already germinated, remove them early, leaving only dormant buds; if the seedling stems are long, you can cut the plant shorter to stop the development of stems and leaves, allowing it to wait for the germination of笋芽 or low buds; if the seedling has multiple compound leaves, you can dilute the leaf fertilizer and spray it on the leaves, taking root external fertilization measures to provide the plant with moisture and nutrition, and extend the process of nutritional growth. Pay attention to using a dilute concentration and choose the morning for spraying. Also, to supplement water in time, you can spray clean water twice a day on non-rainy days, continuously, until new buds germinate and the leaves unfold normally, at which point the root development has also caught up with the growth rhythm.
2.5 Stunted Growth of Medium and Small Seedlings After Removing Flower Buds. Generally, the initial flower buds are cut after transplanting. At this time, the plant's hormonal signal is for reproductive growth, and before this signal is completely terminated, the growth of roots, stems, and leaves will not start, a process that varies in length depending on the variety. Countermeasures: Use artificial growth hormones to interfere and terminate the reproductive growth process, a method not suitable for业余 gardeners and not recommended; improve the growth environment and the distribution of ion types in the soil, such as increasing the amount and frequency of watering, spraying to increase air humidity, reducing light intensity, applying fast-acting nitrogen fertilizer, pressing branches to promote side buds, and cutting off the top 5 small leaves of the branches, to quickly start the plant's nutritional growth mechanism.
3. Pests and Diseases Causing Stunted Growth: This is easy to understand. Pests and diseases can cause physiological functions and processes of the plant to become disordered, the plant's nutrient supply and root development to be obstructed, naturally leading to stunted growth, and in severe cases, the plant will wither and die. You must take appropriate treatment measures for the Rose of Sharon seedlings, eliminate pests and diseases, re-adapt the seedlings, then apply a light amount of fertilizer, water less, spray more (if there are enough leaves), reduce the temperature in a shaded area, avoid direct sunlight, and take good care of the plants. Once the plants recover their vitality, they will naturally rejuvenate and display their beauty.
The above analysis of the reasons for the stunted growth of Rose of Sharon is for your comprehensive understanding and reference!