I've never found a best hour, though I have been known to rush out on short notice when I notice the weather conditions might be favourable for me to take pictures.
Often I'm not looking at the time, I'm watching the light, or even more often I just feel like I need/want to go for a walk in the wood with a camera. Sometimes I take pictures, sometimes I don't (but it's still a walk in the woods and that's almost never bad.)
I'm not sure what the woods are in your area, but here on Vancouver Island (west coast Canada), where the temperate rain forest has big trees (mostly coniferous), large stands of ferns and other evergreen undergrowth, and interesting accumulations of moss, it's hard to find a time when it's not possible to find something to photograph.