How does the dahlia survive the high temperatures of summer?
A comprehensive introduction to how dahlias survive the high temperatures of summer, let's learn about it together below.
Recently, the rainfall has decreased significantly, and many dahlia enthusiasts have noticed that their dahlia flowers are becoming fewer, while the yellow leaves are increasing, and some dahlias have even withered directly. What's going on? Let's talk about the methods to help dahlias survive the summer safely.
Methods for dahlias to survive the summer safely
Dahlias are warm-loving flowering plants that do not tolerate extreme heat, especially imported dahlia varieties, which often wither in summer.
In the past few weeks, there was a lot of rain, and the temperature was relatively low, making it quite cool, so the dahlias have been growing well and flowering abundantly. However, with the rain stopping and the sun becoming very strong recently, the temperature has明显 increased, and our dahlias have shown signs of yellowing leaves and withering.
When dahlias have yellow leaves and wither, there's no need to worry too much. First, we need to determine whether the dahlias withered due to excessive heat or due to waterlogging and root rot.
If there is no waterlogging in the potting soil, most of the yellow leaves and withering are due to the hot weather. To help dahlias survive the summer safely, we need to take some special care.
1. When not completely withered, it is necessary to provide appropriate shading and cooling.
Dahlias have many varieties, and many native varieties, having grown locally for a long time, have higher adaptability to the climate and are more heat-tolerant. In summer, they may experience growth stagnation and a lot of yellow leaves but will not completely wither. There will still be some small branches alive, and they may even bloom sparsely.
For this situation, it is recommended to provide appropriate shading for dahlias in summer, avoid direct sunlight, and water thoroughly after the soil dries out. Once flower buds appear, it's best to cut them off in time to save energy for the summer.
How do dahlias survive the high temperatures of summer?
When the temperature cools down in autumn, dahlias will quickly enter the growth mode, starting to sprout new buds from the bottom of the old branches and bloom again, with a large number of flowers that are very beautiful. For potted dahlias, moving them indoors before the temperature drops and maintaining a higher temperature in winter can result in continuous blooming.
Outdoor dahlias can continue to bloom until late autumn or even early winter. After encountering frost, dahlias will wither and end their blooming period for the year, entering the winter dormancy period.
2. Pay attention to stopping watering to prevent bulb rot when completely withered.
For some imported dahlia varieties, summer can be quite challenging, with early signs of above-ground withering.
If they are planted in the ground and there is a lot of rain, it is recommended to dig up the dahlia bulbs and store them in a cool and well-ventilated place, then replant them in autumn. If the bulbs are not dug up, they can easily rot or be eaten by soil insects, and by autumn, no new sprouts will grow in the soil, leaving nothing behind.
If they are potted, when dahlias have a lot of yellow leaves, it is important to control watering. Once the above-ground part is completely withered, watering should be completely stopped, and the pot should be placed in a cool and well-ventilated area, avoiding rain.
When the temperature cools down in autumn, watering the dahlias again will make them sprout anew. However, for dahlia varieties that completely wither in the summer, blooming in autumn will be later, and if planted outdoors, they often won't have a chance to bloom again because the buds won't open before the temperature drops and frost sets in, forcing the dahlias to enter dormancy again.
Of course, for potted dahlias, timely indoor保温 can still result in continuous blooming, even until the Spring Festival.
The above is a detailed introduction to how dahlias survive the high temperatures of summer. Did you get it?