Dahlia just sprouting in winter: is it frost-tolerant? Winter cold protection and care methods

Dahlia is a flowering plant with rich colors and brilliant blooms, and its flowers are also large. It can bloom twice a year, so gardeners who are familiar with this flower are quite fond of it. But dahlia is not cold-tolerant. After entering winter, its above-ground parts die back, and the underground tubers gradually go dormant.

A dahlia in the dormant period grows very slowly. After all, its metabolic processes are also very slow, basically in a state of stalled growth, which is mainly affected by low temperatures. But if we can provide it with a suitable growing environment in winter, especially if temperature and humidity are guaranteed, then its tubers may also sprout early.

Since dahlia is a flowering plant with poor cold tolerance, new shoots sprouting in winter are naturally not frost-tolerant either. New shoots only appear when temperature and humidity conditions are guaranteed, so if you want the new shoots not to freeze to death, you generally need to provide them with normal-temperature protection. If planting in winter, we can place it in a greenhouse, which can speed up its metabolism, thereby allowing both sprouting and flowering to occur earlier.

But if we only keep it indoors in winter, the plant will at most avoid frost damage, but getting it to sprout smoothly is still quite difficult. Even if it fortunately sprouts because the temperature is suitable for a period of time, it still needs to be placed in a greenhouse promptly, otherwise its tender shoots will likewise be damaged by freezing. As for dahlia tubers stored indoors, if they have not been frozen, they will generally sprout when the temperature warms up the following spring.

The sprouting temperature for dahlia is usually between 19°c-21°c. Even in the relatively warm southern regions of China in winter, this sprouting temperature often cannot be reached. Winter in the southern regions of China generally stays between 0°c-10°c, while in the northern regions of China, winter is basically far below 0°c. So whether in the southern or northern regions of China, it is basically impossible to let it sprout naturally in winter; it is already good if it does not freeze.

Therefore, even if we provide dahlia in winter with the temperature conditions necessary for sprouting and let it eventually sprout early, as long as it loses the guarantee of warm constant temperature, its tender shoots will also be damaged by freezing and unable to survive. Unless it is kept in a greenhouse throughout the winter, it will surely die.