For the rhubarb...

...unless you prefer custard (old joke appreciation society).

We don't have much of our own  compost ready just now so we splashed out on 1000 litres of composted horse manure (It was well composted and had worms in it, Eisenia fetida, in case you are interested).  We also got a bulk bag off mushroom compost that's already been spread on our restored borders.