I’ve to move my established rhubarb bed. It’s not going to be fun for it, but that it will thrive better where it’s going. I’m tempted to put some of it in a large pot (at least 50cm / 20inches deep and wide), but we will see. As long as I water it while the weather is dry and not too much, I think it will be happier in more sunlight. You see this plot is more of a forest garden with lots of tree shade, than a park full of lawns and annual beds. Shade is not what the plant wants, but trees tend to grow and do that.