Scale Sprites Smoothly - problem

Hi! Im writing a script (C#) for scaling an object. I want to scale an object smooth with Vector3.Lerp, but it doesnt work!

plssss help!!!!!!!

the code for scaling:

  Vector3 newsc= new Vector3(0.1f,0.1f,0);
     transform.localScale = Vector3.Lerp(transform.localScale, newsc, Time.deltaTime);
     //transform.localScale += newsc; <--- just scales object

the whole code: using UnityEngine; using System.Collections;

 public class Eating : MonoBehaviour {
 
     public int food;
     public int size;
     public int sizeSt;
     public int fieldOf;
     public Camera cam;
     public PlayerMovement playerMovement;
     public GameObject particle;
     void Start () {
         playerMovement.GetComponent<PlayerMovement>();
         cam.GetComponent<Camera>();
         food = 0;
         sizeSt = 2;
     }
     
 
     void Update () {
         if(fieldOf == 5)
         {
             cam.fieldOfView += 1;
             fieldOf = 0;
             
         }
         if(size == sizeSt) <---- when size is 2
         {
             Grow ();
             size = 0;
         }
 
 
     }
 
     void OnTriggerEnter2D(Collider2D other)
     {
         if(other.tag == "food")
         {
             food += 1;
             size += 1;    <--- for size
             fieldOf += 1;
             Debug.Log ("hit");
             Instantiate(particle, other.transform.position, other.transform.rotation);
             Destroy(other.gameObject);
         }
 
     }
 
     void Grow()
     {
         Vector3 povecava = new Vector3(0.1f,0.1f,0);
         transform.localScale = Vector3.Lerp(transform.localScale, povecava, Time.deltaTime);
         //transform.localScale += povecava;
 
 
     }
 
 }