With trees,flowers and grass ____(plant) everywhere,my hometown had taken on a new look.

With trees,flowers and grass (planted) everywhere,my hometown had taken on a new look.
【解析】
With trees,flowers and grass (planted) everywhere 是用作状语的独立主格结构,即“with +逻辑主语+分词短语”.
plant 是及物动词,表示被人“种植”的植物,因此这里的“树木花草”与“种植”是动宾关系.
如果表示树木花草是自然生长的,需要改用不及物动词 grow,即 With trees,flowers and grass (growing) everywhere