Raycast 2D detecting multiple objects in different positions

So, i'm working in a Plants Vs Zombies recreation, i have this script for spawning the plants, it is basically a Box Collider 2D within the size of the grass grid, i shoot a Raycast with the mouse position, the raycast is shooting constantly so that is has a hover effect, when you hover the mouse on the grid a transparent sprite of the plant is shown.

This is the script:

 void PlantSpaceDetection()
     {   
         RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
 
         if (hit.collider != null && hit.collider.gameObject.GetComponent<GridSpace>() != null
             && manager.plantToPlant != null && manager.previewPlantToPlant != null)
         {
             plantToPlantSprite.sprite = manager.previewPlantToPlant.plantPreviewSprite;
             plantToPlantSprite.gameObject.transform.localPosition = manager.previewPlantToPlant.plantPreviewPosition;
 
             if (Input.GetMouseButtonDown(0))
             {
                 if (manager.CanSpawnPlant())
                     manager.SpawnPlant(new Vector2(plantSpawn.position.x, plantSpawn.position.y), this);
             }
         }
 
         else
         {
             plantToPlantSprite.sprite = null;
             plantToPlantSprite.gameObject.transform.position = ogPreviewPosition;
         }
     }

However if i have mutiple of this objects in the same scene the moment i hover the mouse the transparent version of the plant appears in everysingle grid, i did a Debug.Log and the hit.point appears to be the same for every grid, i'm not really sure why is this happening, any help is appreciated.