How to save the bougainvillea when a cold wave hits and the leaves turn yellow and fall? What should be done when a cold spell causes the bougainvillea to have yellowing leaves and defoliation?

So, how should we deal with the yellowing and falling leaves of bougainvillea in winter?

In winter, the most important thing to do for bougainvillea is to keep warm. However, when it comes to keeping warm, it really varies from region to region and from person to person. Some people keep their bougainvillea in a warm room or air-conditioned room during winter, so there's no need to worry about the plant being frostbitten. However, if you want to keep the leaves of bougainvillea in winter, you still need to bring it indoors early and maintain the ambient temperature above 5 degrees, preferably above 10 degrees.

What should those who don't have central heating and are not used to turning on the air conditioner in winter do? We have to be more diligent.

In December, we need to pay attention to weather changes. When there is a temperature drop, move the bougainvillea indoors at night and take it out to bask in the sun the next day when the sun is out. If it's a closed balcony, place it on the south-facing balcony and close the windows at night to keep warm.

When the temperature is relatively low, close to 0 degrees, it's best to cover it with a plastic bag or old clothes at night to keep warm.

These methods are all aimed at keeping the air temperature higher to prevent the branches of bougainvillea from freezing. However, in winter, protecting the roots of bougainvillea from frost damage is even more important.

Protecting the potting soil temperature

Sometimes when the temperature is lower than -5 degrees, not taking insulation measures can easily freeze the branches of bougainvillea. However, as long as we protect the roots well, the bougainvillea can still sprout in the spring.

In winter, you can cover the surface of the potting soil of the bougainvillea potted plant with a layer of organic fertilizer mixed with planting soil, which can be mixed with organic fertilizer and potting soil in a 1:1 ratio. The decomposed organic fertilizer can effectively maintain the potting soil temperature and also provide fertility for the bougainvillea in spring.

Besides covering with organic fertilizer soil, we can also prepare a larger pot. The pots we usually use to plant bougainvillea are generally small and not conducive to heat preservation. You can put a large pot outside the small pot, and fill the gap between the pots with sand or foam, which can also play a role in insulation.

Or you can wrap the pot with several layers of felt fabric around the bougainvillea pot, which can also keep the pot warm.

Keeping the potting soil slightly dry

When the temperature in winter is relatively low, the potting soil of bougainvillea should be kept slightly dry. If there is too much water in the potting soil, the bougainvillea is more likely to freeze.

In winter, if bougainvillea has leaves falling off, just follow the above methods and do a good job in insulation, generally there will be no danger to the life of the plant, and it will sprout again in the spring. However, if the temperature in winter is too low and the bougainvillea is bare, the time for sprouting in the spring will be slightly later, but as long as sufficient fertilizer and water are maintained in the spring, the bougainvillea will grow rapidly and become very full.

The above is the specific content of what to do when a cold wave is approaching and the bougainvillea is showing yellow leaves and falling leaves. If it can be helpful to you, remember to visit the website often!