Nancy had a question about rhubarb a while back -- 'how do you know when it is ready to be picked?'
All I know is that once the stalks get a decent length, I start cutting. My rhubarb is a mostly green type, and I don't remember the name of it. The plants do seem to send up seed stalks with flowers fairly soon, so I try to cut those out as they start forming so the plants' energy is saved for the stalks. You can find some information on growing rhubarb here. This is rhubarb from my own plants...
With my rhubarb I made some rhubarb pecan muffins...