I was talking to my mom today when splitting a bunch of gifted rhubarb plants, and told her that my comfrey splitting sized (2 knuckles for someone 6') rhubarb plants took off very well, and she looked at me strangely. How small do you cut your rhubarb roots when dividing them?
On a side note the rhubarb patch that I'm making is covered by wood chips, and very little grass about 1' above ground that shakes if you throw an 8' cedar tone 4x4 bird house post from your shoulder onto the ground.
You can eat anything once, sometimes more than once.
One bit.. so one bud and anything that is attached directly to it, maybe about 8 inches round? Each plant is about 1.5ft round when I split them and I split them into 4's normally. I don't generally want more rhubarb just refreshed