Previous research has extensively explored the various physical, chemical, and biological remediation techniques for controlling heavy metal contamination in soils. Common physical and chemical remediation methods include excavation, electroremediation, chemical leaching, and stabilization [11]. Chemical stabilization using soil amendments--such as carbon-based, lime-based, sepolite-based, bentonite-based, iron-based, clay-mineral-based, silicate-based, modified nanomaterials, and other synthetic agents--has been deemed to be effective for remediating contaminated farmland [12; 13; 14; 15; 16; 17; 18]. Phytoremediation, known for its in situ application, environmental friendliness, and cost-effectiveness, has been widely used for the remediation of heavy-metal-contaminated soils [19; 20]. Different strategies have been adopted based on the level of contamination to maximize the effectiveness of phytoremediation. Phytoextraction, which utilizes hyperaccumulators to remove heavy metals from the soil, is suitable for mildly-moderately contaminated soils. Phytostabilization involves using plants to immobilize pollutants, thereby reducing their bioavailability and environmental hazards. Through root adsorption and soil stabilization, phytostabilization effectively reduces the bioavailability and mobility of heavy metals in the soil [21; 22]. The use of commercially available metal-tolerant plants for phytostabilization has gained research interest. _Bidens pilosa_ has been shown to have potential for the phytoremediation of heavy-metal-contaminated soils due to its ability to accumulate and tolerate various heavy metals, including cadmium, arsenic, lead, and zinc [23]. Studies have shown its effectiveness in stabilizing these metals in mining areas, reducing their phytotoxicity, and decreasing metal mobility in the rhizosphere. Thus, vegetation cover on contaminated soils could be restored, mitigating environmental risks [24]. Utilizing native plants for soil restoration was particularly effective in severely polluted mining areas, where environmental pressures selected for tolerance mechanisms. These plants have exhibited higher resistance through effective exclusion mechanisms as well as having a greater tolerance to harmful concentrations [25]. However, the extraction rate of a single plant is relatively slow, and biomass accumulation is often affected under high heavy metal stress. Generally, field experiments require over a year for an objective evaluation of phytoextraction performance, while phytoremediation projects based on phytoextraction take several years or even decades [26]. During the remediation process, plant roots produce substances such as small molecular organic acids under bacterial action, promoting heavy metal dissolution. When the dissolution rate of heavy metals exceeds the extraction rate by plants, the risk of heavy metals diffusing into the external environment remains high. Therefore, \"assisted natural remediation\" became a new trend in phytoremediation technology. This approach involves adding amendments to chelate, adsorb, precipitate, and chemically react with metal ions to accelerate the remediation process, thereby reducing the bioavailability of metals [27]. Thus, the additional application of soil amendments plays a crucial role in enhancing the phytostabilization of contaminated soils. For instance, amendments could be added to improve the physicochemical properties of the soil. Previous studies have often involved the addition of synthetic amino polycarboxylates (such as ethylenediaminetetraacetic acid (EDTA) and glutamic acid diacetate tetrasodium (GLDA)), natural amino polycarboxylates (such as (S,S)-ethylenediamine-N,N-disuccin acid (EDDS) and nitrilotriacetic acid (NTA)),and natural small molecular organic acids (such as citric acid (CA) and tann acid (TA)) to chelate metals, promoting their dissolution and uptake by plants [28]. For instance, the study by [PERSON] et al.