JimH123 wrote:
Here is a hint. If you shoot JPEG, then yes you need to set the white balance with green grass.
If you shoot RAW, then it makes no difference if you set a white balance since you can always set the WB on the image in post processing. Usually this involves doing a temperature offset before the WB, and then comes the Red-Blue channel swapping.
Rob Shea has actions that adjust the white balance. I use it in Camera Raw all the time.