Judith, I mixed the dye and then poured it over the snow. I didn't mix full strength, but pretty strong, by the time it make it through the snow it would be diluted. It worked out very well. I can message you privately with pictures if that would help. You can also google snow dyeing and there is a lot of info out there.
I have seen sprinkle it on the snow, but have never tried it.
Have fun with it, Sharon