How to care for hydrangeas when the temperature drops in late autumn?
An article about caring for hydrangeas when the temperature drops in late autumn, the following is an introduction for you
Temperature dropped! How to care for the tender branches and leaves of hydrangeas, it's time to fertilize them urgently
"Suddenly one night the spring breeze comes, a thousand trees and a million trees梨花开", the north has already had snow, and winter in our great south is approaching. These two days, there is only one feeling, cold! From 30 degrees to 10 degrees, it's like pressing a button to switch, and the next few days will also be continuously low temperature. Many flower friends see the hydrangea leaves turning yellow and start to worry, is something wrong? So, as winter approaches, how should hydrangeas be cared for?
Hydrangea care methods and precautions in late autumn
When the temperature is low, hydrangeas will defoliate and hibernate, and many large-flowered hydrangeas that bloom on old branches must experience low temperatures to bloom successfully. Therefore, in late autumn, we need to pay attention to the following four phenomena of hydrangeas.
1. A large number of purple-brown spots appear on the hydrangea leaves
In autumn, there is more rain, and hydrangeas are easily infected after being sunburned (T-J) disease. If not treated in time, (T-J) disease will spread further, causing most of the hydrangea leaves to be infected, which looks unattractive.
If your hydrangea is now severely infected with (T-J) disease, there is no need to worry. My suggestion is to first cut off the leaves that are severely affected by (T-J) disease, and then keep the leaves that are not very severe. You can spray them with mancozeb for treatment, or if you don't want to spray, you can leave them alone for now.
How to care for hydrangeas when the temperature drops in late autumn?
However, for hydrangeas infected with (T-J) disease, after defoliating in winter, it is necessary to clean up the fallen leaves and spray the entire plant and the surface of the potting soil with石榴合剂 to do comprehensive disinfection. This can greatly reduce the chance of hydrangeas being infected with diseases and pests in the spring of the following year.
2. Purple-red spots appear on the terminal leaves of hydrangeas
In late autumn, the terminal leaves of hydrangeas are prone to purple-red spots, and many flower friends are worried and do not know what causes them.
Actually, these purple-red spots are caused by low temperatures. Although hydrangeas are relatively cold-resistant, the leaves of hydrangeas are large and thin, and they are not frost-resistant. When the temperature is low at night in late autumn, the leaves are prone to slight frostbite. This minor frostbite doesn't need to be managed and has little effect on the hydrangeas.
3. Hydrangea leaves fall off when touched
If the leaves of the hydrangea have many red scars, and the temperature continues to drop, the leaves will fall. If, when entering winter, you find that the leaves of the hydrangea fall off when touched, don't worry, this is going to defoliate and hibernate.