You can soak them longer than overnight and not have a problem, depending upon your weather. I found that out the hard way. I usually soak my bare root plants over night and plant the next morning.
One year I had put a rose out to soak and then got very ill that night and couldn't get back to planting the rose for a week.
At the time, I was living in San Diego and the climate down there allowed me to do a lot of things I can't do now in a vastly different climate.
Lyn
