Perennials are flowering plants whose underground parts can survive winter in the soil, and the above-ground parts will sprout, grow, and bloom again in spring, producing seeds.

Perennials are suitable for the climate characteristics of our region, and with proper management, a large number of wild and cultivated varieties can safely survive winter and enjoy a peaceful summer. The development and application of these resources are an important way to achieve plant diversity in urban greening and beautification, fostering harmony between humans and nature. Perennials have greater vitality than annual or biennial herbaceous flowers, and they are water-saving, drought-resistant, labor-saving, and easy to manage. With proper variety matching, the goal of "flowers all year round" can be achieved, further highlighting the rational allocation of urban greening development and natural plant resources.

Root crops mainly cultivated include: Dianthus, Calendula, Chinese poppy, Alcea rosea, Sky Blue Hydrangea, Lily of the Valley, Hosta, Rhizoma iridis, and Iris species, etc. They come in a wide variety, with vibrant and colorful flowers, strong adaptability, and can be enjoyed for years after a single planting.

Perennials offer the advantage of easy propagation and management, allowing for years of blooming from a single planting, making them ideal plant materials for urban greening and beautification. The underground parts of the plants overwinter without forming large bulbs or tubers, and can still sprout and bloom the following spring, continuing to flower for many years. Most belong to ecological types suitable for cold regions and can be divided into two main categories: those that are more cold-tolerant and those that are less so. The former can be planted outdoors, while the latter require greenhouse cultivation. Reproduction primarily occurs through division, usually during the dormant period. Plants with fewer new buds can be propagated by cuttings or grafting, while sowing is more commonly used for cultivating new varieties.

Wide application range, suitable for landscaping, courtyards, roadside, riverside, and slope greening.

2. One planting can be enjoyed in multiple locations, offering convenience, economy, and the ability to save a significant amount of labor and materials.

Most varieties are not stringent in environmental requirements and can be managed with a more relaxed approach.

4. A wide variety with varying plant heights, flowering periods, and colors, offering a long-lasting display of rich and vibrant hues.

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

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