public boolean onBlockActivated(World worldIn, BlockPos pos, IBlockState state, EntityPlayer playerIn, EnumFacing side, float hitX, float hitY, float hitZ)
    {
	if((Integer)worldIn.getBlockState(pos).getValue(AGE) == MAX_AGE){
		ItemStack harvestItem = new ItemStack(this.getCrop(),worldIn.rand.nextInt(5));
		playerIn.inventory.addItemStackToInventory(harvestItem);
	}
	worldIn.setBlockState(pos,worldIn.getBlockState(pos).withProperty(AGE,MAX_AGE-1));
        return false;
    }

 

I have tried using worldIn.isRemote for both the client and server, but still I get a random number for both the client and server. I then tried to setup a function to handle it outside of the event, and still random numbers for both client and server. So I'm at a standstill at how to get the client and server to sync up and give the right amount. Any help would be appreciated, thank you.

I had tried that, but the item wont update on the client until the gui is forced to update the hotbar

Will do, Thanks for the info. I should've thought about manually updating the client side item with the server.