Posted: 15/09/2015 at 14:11
Leave all the stems and leaves to die down naturally then remove them to a compost heap so they don't provide shelter for slugs over winter. Pile on a mound of well rotted horse manure and/or well rotted garden compost to act as a winter mulch. The worms will work it in over winter and the rhubarb roots will benefit from the extra nutrients.
Come spring, just as the first shoots start to nose their way out of the ground, scatter generously with blood, fish and bone or pelleted chicken manure and a few wildlife friendly slug pellets. Crop the stems till mid July then leave the plants alone to rebuild their vigour for the following year. Repeat as above in autumn and spring.
Once the plants are big enough to cope, you can cover one each spring to force the stems to make those lovely, juicy, tender pink stems. Once harvested you then have to leave the plant to recover and then harvest the other in the usual way. Alternate the one that gets forced each year so they have time to recover.
If your Victoria is really large, you could consider splitting it in autumn and replanting as 2 or 3 clumps. They would need at least one whole season to recover and establish before you could force them.