The slow acclimatization of large rose seedlings
Core Content Guide: This article focuses on the content related to roses, specifically the slow acclimatization of large rose seedlings. Below, the editor provides a detailed explanation for you.
This season, there are more sellers offering bare-root large seedlings, and compared to toothpick seedlings, many gardening enthusiasts are unsure how to handle large seedlings. This article mainly discusses the handling of bare-root seedlings. There are two types of bare-root large seedlings: those with soil balls and those completely bare. As long as the survival rate is well controlled, the survival rate of bare-root large seedlings is still quite high.
I. For large bare-root seedlings with soil balls, they can be planted directly in the spring and autumn seasons when the temperature is not too hot. They can be acclimatized outdoors directly as long as the temperature is kept below 22 degrees Celsius, and shading is not required. It is not recommended for beginners to buy bare-root large seedlings in the summer, as it is difficult to acclimatize them, and even experienced gardeners may not have a high survival rate. In winter, planting directly with good soil mixture almost always ensures survival, and direct sunlight is fine.
Before planting, it's best to gently rinse the surface of the soil ball so that some roots are visible. Many sellers' large seedlings have hard yellow soil, and rinsing to expose some roots promotes root growth; otherwise, the seedlings can easily rot and die. [The medium used by many sellers with soil balls differs greatly from the medium used by gardening enthusiasts, and such a large difference in medium makes it difficult for roots to grow, so it's best to use a medium similar to the soil ball.]
Bare-root large seedlings with soil balls do not have severe root damage, so they are easier to acclimatize. When the temperature is above 22 degrees Celsius, proper shading should be done for about four to five days. The medium used for raising seedlings should be the same as the soil of the bare-root large seedlings for quick adaptation. I recommend using garden soil mixed with some loose medium.
If large seedlings have many leaves before planting, it is best to remove some leaves, as the root system is already damaged. Removing some leaves helps reduce moisture evaporation too quickly, preventing the stems from wrinkling and drying. If there are sprouts on bare-root large seedlings, it is recommended to remove half of them. Strong sprouts can only grow when the root system is developed. If the root system of newly transplanted seedlings is weak, I suggest reducing some of the sprout parts. Otherwise, the sprouts will eventually dry up or become semi-dry. Proper handling of seedlings in the early stage is very important.
After planting the bare-root large seedlings, water thoroughly once. During the acclimatization period, if the stems are green, it means they are still alive. If there is no drying or wrinkling of the branches after half a month of acclimatization, it means most of the seedlings have survived. Remember one important point: do not water too frequently. Many gardening enthusiasts have lost seedlings due to excessive watering after transplanting bare-root seedlings. Excessive water can easily cause root rot. Slightly drier medium is beneficial for root growth, but not too dry. Moderate water control is better.
Bare-root large seedlings with soil balls are relatively easier to acclimatize. The key points are the proportion of the medium, water control, and temperature control to decide whether to acclimatize in full sunlight or with shading. Also, the medium used during acclimatization should not have any fertilizer and should be loose and breathable.
II. The acclimatization of completely bare-root large seedlings follows the same requirements as above. After planting, water thoroughly to promote root adhesion to the medium, which is beneficial for root growth. It's best to shade for a few days initially and then decide whether to acclimatize in full sunlight based on the condition of the seedlings, with moderate sunlight. It is not recommended to acclimatize in full sunlight when the temperature is above 22 degrees Celsius. Since completely bare-root large seedlings have relatively severe root damage, special attention should be paid during the acclimatization period. With reasonable control, whether it's seedlings with soil balls or completely bare-root, the survival rate can be quite high.
The above is a comprehensive explanation of the slow acclimatization (bare-root) of large rose seedlings. I hope it can help you solve some of the problems you may encounter with green plants.