Blended Male for nutrients

From my indoor grow I have 3 plants. Two are showing female pre flowers unfortunately the third is showing male. Obviously I am going to kill the male but I thought it might provide some great nutrition to the soil for the other two if I blended it and added the mix to their soil as mulch . Anyone have any experience with this or any cautions against it? The male plant is early pre flower only showing a few male balls on sticks so I am assuming there is no pollen at this point to worry about?

You want to take the risk?

I don't want to risk pollenating the females but the pre flowers have been about 2 days and are tiny, it took a magnifying glass to make 100% sure so I would have thought no actual pollen production has begun.