What are the wild resources? How to use wild resources to effectively reduce the cost of greening and maintenance management?

Let me talk about my understanding of the problem below: First, I will give several successful examples: 1, which can be used as a group for planting wild scenery and ecological belts. This kind of plant has low cost and fast propagation, and it only needs to tidy up dead branches once a year in winter. 2, renal syncope, (this plant has been artificially propagated in many places) can be planted as an ecological belt, and the cost of planting and breeding is very low. 3, Hosta Hosta, shade-tolerant, can be planted as woodland and can be extensively managed. Second, the cost of planting mainly depends on the understanding of design and landscape effect: in fact, there are not many wild materials available, even if there are, such as wild Pterocarya stenoptera, Metasequoia glyptostroboides and Ginkgo biloba. Due to the lack of concentration, inconvenient transportation, forest land protection and many other reasons, the utilization cost is not low. There is no distinction between high and low plants, which is only caused by human value orientation. For example, some people recognize the lawn and deny the role of Ophiopogon japonicus. In fact, after planting the "lawn", Ophiopogon japonicus is pruned twice a year (May and August) during the growing season, and the effect is also beautiful! And its maintenance cost accounts for about 10% of lawn grass. In addition, in terms of plant configuration, most people pursue tall and rare trees, so there is a saying that "big trees enter the city" and "exotic trees". It is considered that it is better to plant 20cm strong trees than 50cm old trees such as ginkgo biloba and gizzard. Only a few foreign varieties are used, and most of them should be local varieties, which can effectively reduce the planting cost. At the same time, in terms of plant configuration, reduce the configuration schemes that need a lot of pruning and management, such as hedgerows, spherical plants, color blocks and lawn grass, and give priority to low maintenance schemes to reduce management costs. In a word, I think there is very limited space to reduce the planting cost by using wild resources, and the planting scheme has great potential.