Perennial flowers are those that can overwinter with their underground parts in the soil, with the above-ground parts regenerating, blooming, and producing seeds the following spring. The advantages of perennial flowers are their ease of propagation and management, allowing for years of flowering from a single planting, making them highly suitable plant materials for urban greening and beautification. These plants have underground parts that overwinter without forming large bulbs or tubers, and they can still sprout and bloom the following spring, continuing to flower for many years. Most belong to cold-region ecological types, which can be divided into two major categories: those that are more and those that are less tolerant of cold. The former can be planted outdoors, while the latter require greenhouse cultivation. Propagation primarily occurs through division, generally during the dormant season. Species with few new buds can be propagated through methods like cuttings and grafting. Seed propagation is more commonly used for培育new varieties.

Perennials feature distinctive characteristics:

Widely applicable, it can be extensively used in greening projects such as garden landscapes, courtyards, roadside, riverside, and slope areas.

2. Once planted, the flowers can be enjoyed in multiple locations, offering convenience, affordability, and significant savings on labor and resources.

Most varieties are not strict in environmental requirements and can be managed in a more relaxed manner.

Variety-rich with plants of varying heights, blooming periods, and colors, the display lasts long, featuring a rich and vibrant spectrum.

5. Many varieties possess strong capabilities for environmental purification and resistance to pollution.

6. Some varieties are excellent materials for cut flowers, potted flowers, and dried flowers.