Fyfer,

The brown spawn fall while the rainbows are spring spawners. The precise time I will defer but consistent with this the eggs of your fall caught trout, the brown was close to ready but the rainbow was not. I would look for the rainbow eggs some time after ice out noting the water temps and date. Same can also be said of the browns only you would start end of September. You might do some research on optimum spawning temps which might provide a better start for your attempts.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers