Prompted by this, I had a look on my plot and it has grown just enough to harvest a couple of pounds. The stalks are only 8-9" long, but it's a big patch and generally goes to waste later in the year, so though I might as well harvest it early before it gets to full size.
Handed over to partner now, who will bake something scrummy. I did hint that the rhubarb and ginger cake was nice last year🙂