What plants should be planted in green belts in winter that are both cold-tolerant and easy to care for?

In winter, choosing the right annual and perennial flower varieties for green belts can not only add a touch of bright color to the city, but also showcase the unique vitality and vigor of winter. Here are several recommendations for annual and perennial flowers suitable for planting in winter green belts:

Stock (Matthiola incana): Stock bears abundant blooms with a delicate fragrance, and its flower colors span purple-red, pale red, pale yellow, white and more, giving it great ornamental value. It tolerates low temperatures, growing vigorously even under cold winter conditions, and has a long flowering period. The plant is elegant and graceful, with evergreen leaves that add a touch of vitality and serenity. The flowers of stock are small and refined, growing densely at the top of the stems, exuding a unique charm in green belts and adding a touch of warmth and romance to the city in winter.

Daisy (Bellis perennis): Daisy plants are small and refined, with pure white petals like jade and a yellow center; their fresh and elegant appearance gives a sense of purity and simplicity. It has good cold resistance, can maintain vigorous vitality in the cold winter, grows quickly and is easy to propagate. It is often planted as a groundcover plant in green belts, forming a sea of pure white flowers and bringing a touch of tranquility and innocence to the winter city.

Viola (Viola cornuta): Viola flowers are relatively small, with a very diverse range of colors including red, white, yellow, purple, blue and more, and the flower shape is distinctive, with petals often bearing unique markings. Its cold resistance is excellent, and even in the cold winter it can still bloom in profusion, making it one of the excellent flowers for winter green belts. Viola plants are low and compact, often growing in clusters, with a large number of blooms, and can create a rich colorful atmosphere in green belts; its small and refined flowers sway gracefully in the cold wind, bringing vitality and energy to the city.

Petunia (Petunia hybrida): Petunia flowers are large and brightly colored, with a wide range of colors including red, pink, purple, white and more, and diverse flower forms, including single and double types, giving it extremely high ornamental value. Although petunia has relatively weak cold resistance, in some warm regions of the south, it can still grow and bloom normally in winter, adding brilliant color to green belts. Its plants grow vigorously, with lush branches and leaves and dense flowers, and can quickly attract people's attention, becoming a focal point in the city's winter green landscape.