Frost damage, mildew, mildew spots, and sunburn on succulents
The editor will share some experience about succulents with everyone, including frost damage, mildew, mildew spots, and sunburn on succulents. These are very useful tips, so it's recommended to save them for later!
Succulents may experience some discomforts during the planting process. The following are the appearance, causes, and treatment methods of frost damage, mildew, mildew spots, and sunburn that can occur during the planting process of succulents, which can be matched accordingly.
【Frost damage on succulents】
This situation is caused by prolonged low temperatures or short-term sharp drops in temperature. There will be no immediate signs after the succulents are damaged. The frost damage will gradually show up in later growth, and severe cases can even cause the newly grown leaves to have the same frostbite. Such succulents have a reduced immune ability and are very prone to fungal diseases. It is necessary to increase the duration of sunlight to make the succulents healthy. Also, gradually adjust the condition of the succulents, with a temperature of about 15 degrees being the most suitable, allowing the succulents to have a transition period for the temperature.
【Mildew phenomenon in succulents】
There are several main reasons for this phenomenon. For example, succulents that are not covered with a layer of stones on the surface after planting are particularly prone to mildew. Overwatering, low temperatures, poor ventilation, and the inability to evaporate moisture in time can lead to succulents reducing their water absorption due to low or high temperatures. This situation is particularly common in winter and summer, and it can even lead to death in severe cases. However, you can immediately try to remove the remaining leaves for leaf propagation, and剪掉 the blackened part above the soil surface immediately, which still has a chance to sprout new buds. In the photo below, the roots of the 'Fireworks' plant are completely rotting, but there is still hope. You can trim the bottom part immediately, then dry it in the sun and plant it in dry soil.
【White mildew spots on succulents】
This condition has only been found in the 'Crassula' genus of succulents, especially 'Fireworks' and 'Red Demon Castle'. The exact cause has not yet been analyzed, but it is certainly related to watering, with excessive moisture in the soil leading to a relatively humid environment. Crassula does not require much water, especially in summer, but these white mildew spots do not seem to have a significant impact on the growth of the succulents. The succulents with white mildew spots at home have all grown new leaves, and most of the branches have started to lignify, so further observation is needed!
【Sunburn spots - disease on succulents】
This is a very common phenomenon, especially with succulents that are kept outdoors, which are easily prone to these scars. The most common cause is water droplets, either left on the leaves after watering or small droplets left on the leaves in the morning. After晴天日照, the scorching causes scars, a simple principle similar to using a magnifying glass to focus sunlight and start a fire. This is particularly common when placed outdoors in strong ultraviolet light. Relatively speaking, succulents placed behind glass rarely experience this, as glass blocks most of the ultraviolet rays, making the UV exposure for the succulents behind the glass very mild. However, it has also been found that after improving the sunlight environment, new leaves sometimes still have these scars.
Currently, the exact cause is not determined, but after discussing with other plant enthusiasts, it seems to be a disease similar to freckles in humans. These spots do not affect the growth of succulents, and they will become very beautiful when new leaves grow out. The bottom, aging leaves will also gradually dry up and fall off, so there's no need to worry too much.
【Color change even when晒 behind glass】
Many plant enthusiasts think that glass blocks too much ultraviolet light, and most of the time, the temperature inside is relatively constant. Therefore, not only do the succulents not turn a beautiful color, but they often grow ugly and leggy. Actually, these understandings are correct, but it is because some conditions are weakened when keeping succulents indoors that causes such effects. If the daily sunlight reaches 4-5 hours or more, or if the windows are often opened for ventilation to maintain a temperature difference, the succulents will still change color and will not grow leggy. Below is a succulent that has been kept indoors at a relatively constant temperature for half a year.
Indoor conditions: The windows are completely sealed, with no ventilation, 4-5 hours of sunlight per day, and a temperature of 22-26 degrees in winter. On sunny days, the windowsill can even reach 30 degrees. You can refer to the above conditions and make some adjustments to your own succulents.
The above is a detailed explanation of frost damage, mildew, mildew spots, and sunburn on succulents, for everyone's reference and suggestions!