Issues with trigger

For some reason I am heaving issues with collision and trigger detection. From what i can tell I followed the code properly but my text is not updating. I have the cube checked as is trigger and the script is on the cube. the sphere is labeled player. I put a debug.Log in the if statement but it does not output so I assume it is not seeing the collision or the tag. Code Below:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;


public class pickupHealth : MonoBehaviour {


    public Text healthText;
    public int pickupAmount = 10;
    public int currentHealth = 50;


    // Use this for initialization
    void Start () {


        healthText = GameObject.Find("Text").GetComponent<Text> ();
    }
    
    // Update is called once per frame
    void Update () {
        healthText.text = "Health " + currentHealth;
    }


    void onTriggerEnter(Collider col){
        if(col.gameObject.tag == "Player"){


            currentHealth += pickupAmount;
            Debug.Log("player detected: add health");
        }


    }
}