What varieties of cold-hardy landscaping flowers are there for northern regions?

For friends who have long lived in the north, some flowers and green plants can often be seen in places such as roadside green belts. Especially in flower beds beside urban roads, in parks, and even in industrial parks, these flowers and plants often produce a very good landscaping effect. And in beautifying the environment and purifying urban air, these flowers and plants often play an important role.
However, in northern regions, each of the four seasons of the year generally has its own obvious characteristics, especially in terms of temperature, which is often very distinct and can even form an extremely large temperature difference. Therefore, when planting these flowers and plants in northern regions, strong cold resistance is the first factor that needs to be considered. So, what are they?
When people pass by flower clusters and feel the beauty of the environment while enjoying them, few may think about what kind of seasonal changes these flowers and plants have to endure in the outdoor environment. Admittedly, these flowers and plants have extremely strong cold resistance, so they can maintain a good growth state, and thus can show their most beautiful side to people and bring people joy. The most representative flowers and plants in northern regions include tulips, American pink, coreopsis, coneflower, black-eyed Susan, violet, cosmos, and so on.
It is precisely because these varieties of flowers and plants have extremely strong cold resistance and stress resistance that they can present themselves in full bloom even in harsh environments, bringing people endless joy. As these flowers and plants bring many benefits to our cities and the people in our cities, we naturally should also cherish them and carefully care for them, because they are also an important part of our beautiful urban life.
The flowers and plants seen everywhere in cities can not only beautify our environment and add beautiful scenery to our lives, but also bring a lot of vitality and energy to our living space. Just imagine, in a city without flowers and green plants, could you feel a scene of dead silence? Whether it is purple tulips, or bright yellow black-eyed Susans, or pink coneflowers, it is these small lives that bring infinite vitality to our living space.
Compared with the relatively warmer regions in the south, there are not particularly many flowers and plants suitable for planting in the cold northern regions, so we should cherish these green plant resources that can live in the northern environment even more. We believe that under people's careful care and scientific management, these flowers and plants, weak in life yet able to shine brilliantly, will certainly become beautiful scenic lines in the city.